Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b939c8d4e1f5a52…

MALICIOUS

PDF

52.9 KB Created: 2020-08-15 20:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ac8d0cbd1dff28b2be1fa4394de5f908 SHA-1: 1469143e853798803b87dada44ae2ea8719b611d SHA-256: 8b939c8d4e1f5a52538bda5b40404d9843bd6dd6bc21c35be899d43cecf5b92c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains URL fragments that appear to be part of a lure related to a 'power bank xiaomi 20000 2c manual'. The presence of a PDF link farm heuristic further suggests an attempt to distribute malicious content or SEO spam. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wb?keyword=power%20bank%20xiaomi%2020000%202c%20manual In PDF document text
    • http://files.igi-fitness.com/uploads/1/3/2/6/132695782/8730873bd.pdfIn PDF document text
    • http://files.cordovaswitnesses.com/uploads/1/3/0/8/130874110/5027452.pdfIn PDF document text
    • http://files.tshollband.com/uploads/1/3/2/8/132814343/wukutomik_notaruzu_gutofumoxe_pojazisok.pdfIn PDF document text
    • http://files.gratitudecafebakery.com/uploads/1/3/1/1/131164199/a09e2473.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/ginageroguk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3202/6008/files/frederick_noad_solo_guitar_playing_book_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/19853714557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/xidevejus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4013/5589/files/describing_people_s_personalities_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/33374625424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tesip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3119/8886/files/45822907076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/backgammon_regeln.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/fimigunuviris.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1687/0296/files/test_riesgos_laborales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0333/0209/files/kansas_bill_of_sale_car.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5176/8225/files/revasurevumivofiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/atomic_structure_timeline.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0F 2316 bytes
SHA-256: b81fd82a6c0eecacfec83fc83cb3f3b529f2d4dd712fa8dc92f2b610cc4db25e
font_01_sfnt_off0000773c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773C 5208 bytes
SHA-256: 4d869b8f5eb9607e539e77dec159ba6168820c2019a1cff41aeda6274fbddaa7
font_02_sfnt_off000088da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88DA 2076 bytes
SHA-256: 351fe6c10cd6078bfc4d57aa4ee773bed517b6c680c55aceeadcbe8a752ffd14
font_03_sfnt_off000091dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91DC 10496 bytes
SHA-256: 9bfa4f2202d7621788325c08bd91f5bdfe3fa9213f52299151674be62d3ec58c
font_04_sfnt_off0000b53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB53D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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