Malicious PDF — malware analysis report

Static analysis result for SHA-256 83b0878f09242f14…

MALICIOUS

PDF

41.2 KB Created: 2020-08-21 00:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 325dc81df9ee39391de4e084d359f0b8 SHA-1: 0bf17ba84646ed82806ea5c4c12d4d3afabef438 SHA-256: 83b0878f09242f143cb22182442547c5b50444f8e85b24217d4daa7ddc9d29e4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=compass+learning+algebra+1+answers`. This redirector is likely used to obscure the final malicious destination and potentially engage in SEO-based link farming to attract victims. The document body, though heavily obfuscated, contains text suggesting a lure related to educational materials, aligning with the redirector's keyword.

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=compass+learning+algebra+1+answers In PDF document text
    • http://mutod.ballisticstrength.ca/uploads/1/3/0/7/130775823/f9077558ed5129.pdfIn PDF document text
    • http://wopube.dslvnjny.com/uploads/1/3/2/6/132696056/18b0ff5.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/1/0435/0250/2054/files/31046643323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0299/2536/files/bitebir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/52005742845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/44185217589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/nsfas_application_form_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/54559917792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/41758012758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/vajoxamujozagotedemefito.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_off000062be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BE 5328 bytes
SHA-256: b725166c6e3e32abadff1b0214a15d6fffb9ef8607186fe79f05d5250cd3ba2e
font_01_sfnt_off000074d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D7 10280 bytes
SHA-256: e0b6f6fb9a47770b58a3af8be8466e09bed5cd6328a0df75768fa4cc5c3b8f08

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