Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ec867af9e101cb…

MALICIOUS

PDF

39.1 KB Created: 2020-08-12 14:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 892ff3f0fc1a7f5f99333782d0f39932 SHA-1: fae41f16120da7bf8ee735b863e5a8335847a3fb SHA-256: 05ec867af9e101cb506e8e258cb17109c1df663810465aaddec7ffcfafe7f4d7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many of which point to a redirector service (ttraff.cc) that is flagged as malicious. The document body, though heavily obfuscated, contains text related to '5th grade math place value worksheets pdf' and a URL that appears to be an SEO lure. The presence of a malicious redirector and the structure of the PDF suggest an attempt to drive users to a malicious website, likely for phishing or malware distribution.

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=5th+grade+math+place+value+worksheets+pdf In PDF document text
    • http://sutij.cefcrc.org/uploads/1/3/1/3/131383309/kujosujifi.pdfIn PDF document text
    • http://xovajexa.appgeogconf.org/uploads/1/3/1/3/131384260/jomegakuv-fizugubedewujax-xikiladebot-taxoxojida.pdfIn PDF document text
    • http://files.ar2cogic.org/uploads/1/3/0/7/130776852/8332442.pdfIn PDF document text
    • http://pixulebag.preptour.com/uploads/1/3/1/1/131164312/rugatujoxu_pixud_beluk.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/1/0430/2998/7489/files/53342236005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/71619107247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/zirafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1909/2647/files/bizorifakaxoradaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7539/3946/files/acorus_calamus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texojorigerusoxuduk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5800/3096/files/7264772762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5455/4533/files/24537030104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/50453893373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/cantico_di_frate_sole_testo.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 3

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_off00005a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A53 5816 bytes
SHA-256: a8608223204b3b12641642dd8e100b2584f318a1a41113a16c8c72e2b26f596c
font_01_sfnt_off00006e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0E 9732 bytes
SHA-256: 864d7c860211e3c5615890606cd93177618d82bed9765494309558f0e15a8eb6

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