Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfda7ab4b1597287…

MALICIOUS

PDF

52.5 KB Created: 2020-08-18 20:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e4f3b0285b8986b20068e19efe156cbb SHA-1: 1c5594dcc1c888146fa52aed409d7138cf488d7b SHA-256: dfda7ab4b15972873695bc8592ffe19c4911a5c72ca7195b61552f9427feba18
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as "Cisco ccna 2 packet tracer answers" which points to `https://ttraff.ru/pify?keyword=cisco+ccna+2+packet+tracer+answers`. This link is designed to lure users to a malicious site. The document also contains a large number of links to PDFs hosted on Shopify, likely part of a link farm to improve SEO for malicious content. The ML classifier 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.ru/pify?keyword=cisco+ccna+2+packet+tracer+answers In PDF document text
    • http://files.memoriesofvignacourt.com/uploads/1/3/1/0/131070938/gutunixejon-metatetujuwo-kewalavujetavap.pdfIn PDF document text
    • http://files.coldcomfortswhistler.com/uploads/1/3/1/6/131606687/755e77886309.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/1/0432/6598/2632/files/rokazebawigadafuviriros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0292/9047/files/24478342507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/guwagusizopewabodopog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2197/6220/files/diwugidewurux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4675/5734/files/sesid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/6554/5628/files/puerperal_pyrexia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3378/6525/files/22169730037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1721/5905/files/77123579467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5841/1158/files/whirlpool_duet_sport_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/vim_copy_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5312/files/95222362520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3505/5512/files/84611193592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/fonusexalepepuxovodedela.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 4

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_off00008475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8475 5088 bytes
SHA-256: e434d4151dd58a4eb7947eefe97e5ec7d8952c32e4e40bb8f174153fff23d352
font_01_sfnt_off000095e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E3 15280 bytes
SHA-256: 9038a3f56af49be9c83eb36552eb65869119947ebad6c5d7604ed23a7272ae83

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