Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4915bb1b9923c20…

MALICIOUS

PDF

43.5 KB Created: 2020-08-08 05:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: adc7593fdb528200814d311fb0ce103a SHA-1: b53c5fa8bb1ad78ec86bd400565e9cc82566ba87 SHA-256: c4915bb1b9923c205c714121163eb8566e8b080f3b5976431738b6bbd69ce13b
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=approximation+questions+for+sbi+po+pdf+download'. It also contains a PDF link farm heuristic, suggesting it's part of a larger SEO manipulation scheme. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure. The primary attack pattern is social engineering via a deceptive link.

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=approximation+questions+for+sbi+po+pdf+download In PDF document text
    • http://files.awrightdehernandez.com/uploads/1/3/0/7/130739510/290758.pdfIn PDF document text
    • http://files.mackeiganmarketing.com/uploads/1/3/1/4/131452732/sodopafesub.pdfIn PDF document text
    • http://tudugirok.terraloka.com/uploads/1/3/2/6/132682646/xefowabuxovibet_guroj.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/1/0428/8295/7478/files/mathematics_formula_of_class_11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/jboss_application_server_7_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7676/4327/files/bigas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/7114669344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/mikefubusazatodewol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7135/7596/files/38681109948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/lakowufawefagevativojusem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/35278004392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/tikugeruwirobibifata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9818/6663/files/kegadatewad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/42128965916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2058/2050/files/sezuvolupuzijewagebu.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 8

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_off000065f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F0 5604 bytes
SHA-256: 25976cf690857ff46ab23d86bf799d47055317db79426b497a1a7c090ce79a3f
font_01_sfnt_off000078f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F0 11720 bytes
SHA-256: dcb676d1e302baa4b71eb604b9132eca8c3e094c4548c2d311a653195b6e4a22

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