Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6cc88bed8c077dd…

MALICIOUS

PDF

43.5 KB Created: 2020-08-15 07:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4cc7ccec03db055a6f4245c335482d4a SHA-1: 77d191603292a027b90fd9f1bbda394b1f4c5647 SHA-256: e6cc88bed8c077ddec836260e7531dcbb9b99cd21676733b576e1016b84e6763
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=complex+fractions+worksheet'. The document body, though partially corrupted, suggests a lure related to 'Complex fractions worksheet'. The presence of a link farm heuristic further indicates an attempt to distribute content or traffic through numerous external links, with a significant number pointing to Shopify domains. The primary attack vector appears to be directing users to malicious infrastructure via embedded links within the PDF.

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.com/pify?keyword=complex+fractions+worksheet In PDF document text
    • http://files.puristaromas.com/uploads/1/3/0/9/130969505/nexero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5235/2159/files/29738719774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/wokadisobuziba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/68797715342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/vajewaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/junimomekudefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/adobe_premiere_tutorials_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/pizazotekezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9749/6477/files/worldwide_airport_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/3271502434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9849/5389/files/agility_ladder_drills_soccer.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3F 5384 bytes
SHA-256: 0d203ee4fd88d703769e6e809cd15660c1a1fbcd4db8829f674738764b479a5d
font_01_sfnt_off00006e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6B 6068 bytes
SHA-256: 58b4873d33ac9fffaf45ed1a2312b8eb5fadf3b067e77f8cfe9e87095f6a7717
font_02_sfnt_off00007e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1C 10360 bytes
SHA-256: 8179cb5cfc663564ea07bedc57d16ee13f99dd80f049dc6d1c68ce180ab5cecd

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