Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a172427a67180da…

MALICIOUS

PDF

45.1 KB Created: 2020-08-08 10:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 891de2230b5e2e067214f312b395bbbd SHA-1: 2289e650a5572b23af3733bfc1ad5f95ea947099 SHA-256: 8a172427a67180da80160f4eceddc51591b0640190319928585514845eeeae45
194 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is related to "algebra equations notes pdf", likely a lure to entice users to click the malicious link. The embedded link directs to `https://ttraff.cc/pify?keyword=algebra+equations+notes+pdf`, which is flagged as malicious. The file also contains numerous links to shopify.com and other domains, likely part of a link farm to improve search engine ranking for the lure 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.cc/pify?keyword=algebra+equations+notes+pdf In PDF document text
    • http://files.changedbythomas.com/uploads/1/3/0/7/130776499/617ba31.pdfIn PDF document text
    • http://files.beachleech.com/uploads/1/3/0/9/130970023/3393608.pdfIn PDF document text
    • http://files.atowncenter.org/uploads/1/3/1/8/131860645/fokisawo.pdfIn PDF document text
    • http://files.technologyallianceontario.com/uploads/1/3/1/1/131163736/gabalomiluleba.pdfIn PDF document text
    • http://files.brokenbayparentcouncil.com/uploads/1/3/1/8/131857315/6890804.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/1/0431/0528/8352/files/volanabuwisenamuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mujunevuduw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3301/0081/files/73782649368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/104046800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/18248195117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/tiwagibavidozunedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/97956558204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/55918234555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/48256786699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/wuduragav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56802730071.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_off0000720a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x720A 5464 bytes
SHA-256: 00e588c783cd55cf50f9bbeeddece0fed4806a8fd0fd988047bc09d0a83aa709
font_01_sfnt_off000084a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A0 10296 bytes
SHA-256: a86d412f7916475ef53767a3fe2eb6dd5851d0afc3bc3bb843b394f5672eabc7

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