Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e04ca8c381cb77b…

MALICIOUS

PDF

44.2 KB Created: 2020-08-25 19:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a51694756108a12a00d9a99bbe8158ed SHA-1: 64477b824dbb3639ac54442b17d4699be0cf90c9 SHA-256: 1e04ca8c381cb77b90adba1462b19a564e59204d7b0a6cffa54f5b13153021a9
194 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to domains associated with link farms and redirectors. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=bd+result+2019+hsc+with+marksheet`. The document body, though heavily obfuscated, contains text related to academic results, suggesting a lure to trick users into clicking the malicious links. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=bd+result+2019+hsc+with+marksheet In PDF document text
    • http://gatuki.greatfallstrapandskeet.com/uploads/1/3/1/1/131163744/8852303.pdfIn PDF document text
    • http://sokonowib.genachastain.com/uploads/1/3/2/7/132710712/zufupezokor.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/1/0436/1535/5042/files/3562579395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/skyrim_filial_bonds_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/pupomum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/4069/4432/files/jewozusozugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4952/4127/files/zagemekizezebebapesurexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8520/1561/files/tamil_movies_2019_hd_print.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/xusanaxog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55628578329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/verifying_trigonometric_identities_worksheet_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0849/0663/files/bujitilavixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9057/0405/files/metode_ceramah_adalah.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 2

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_off00006463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6463 5868 bytes
SHA-256: 9d7323c273af5594eff0f5ab428c8ec53679600b88f183cb8fcb076e31d764c0
font_01_sfnt_off00007849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7849 13952 bytes
SHA-256: 143d4c48a663c80d78dcc1fd298c60073fdd61ab2c8f207fd6c235e5e51ca9dc

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