Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b98b0f76fa4be1c…

MALICIOUS

PDF

42.7 KB Created: 2020-08-20 08:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e3f22c35a6a99e9dddfd7ec8d25237ab SHA-1: 27474f58d46965d435519d16997690da5c72c938 SHA-256: 3b98b0f76fa4be1c828caa49b460ef5776940fc3f6ab75395f01bb149596f4c8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that redirects to known malicious infrastructure, disguised with a lure related to 'Android 10 update wifi issues'. The document body and embedded link annotations confirm the presence of this lure and the redirection URL. The PDF also hosts a large number of links to other PDFs, likely for SEO poisoning or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=android+10+update+wifi+issues In PDF document text
    • http://files.harmonyhillaussies.com/uploads/1/3/1/0/131070581/5941566.pdfIn PDF document text
    • http://files.thejoyfueledteacher.com/uploads/1/3/2/7/132740905/texanuko.pdfIn PDF document text
    • http://files.hotrhythmholiday.com/uploads/1/3/2/6/132695828/e80dafa898562ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/21590489198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/wizovugubiroxewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9898/7941/files/idaho_511_road_reports.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/mabojag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xodowowesibaxen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2684/0737/files/21056864307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/96188307877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5076/1377/files/54482172358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/gumedoginedefur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/27988145131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3784/1813/files/lutuzaridozuvezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/pitugusukaremuxo.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 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000697f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697F 5276 bytes
SHA-256: 9c4a12700f5ee7a0bf910aeafb7f1993ef6d66a1c183ed9e8c32dc52c4a73d3e
font_01_sfnt_off00007b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B94 10128 bytes
SHA-256: e36024ce972d22eb172e25c6c1718fc4f186585b9a24b659a728cade3bd3e97c

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