Malicious PDF — malware analysis report

Static analysis result for SHA-256 166875f09cf9ce18…

MALICIOUS

PDF

44.0 KB Created: 2020-08-06 04:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e9d743f4f523b6b2661368a3b926ca4 SHA-1: d08adc55c221f4b1138cd73ffeb1ead67b14c1f6 SHA-256: 166875f09cf9ce18790308ba8ffa65811f09b96e9388c03ad9fe125135b15845
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'https://ttraff.cc/pify?keyword=reading+assessment+tools+pdf'. This redirector likely leads to a phishing page or malware download. The document body also contains a large number of benign-looking Shopify links, suggesting a link farm or SEO manipulation tactic to obscure the malicious redirector. The ML classifier also 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.cc/pify?keyword=reading+assessment+tools+pdf In PDF document text
    • http://files.cgpto.org/uploads/1/3/1/8/131871963/pulivuj.pdfIn PDF document text
    • http://mofakijis.ktharrington.com/uploads/1/3/0/7/130740596/db883.pdfIn PDF document text
    • http://serim.johnreidpe.com/uploads/1/3/0/9/130969356/nejuvipo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/nonufipotidefubovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/47925072231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/27014976654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/new_levels_asap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7066/6390/files/dufulodilomuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/10481678864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/dikil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/nifisako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/giferepigiluze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/pepokakabowitivobogitabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6408/0024/files/norma_tecnica_de_anemia_2020_minsa_peru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/rodipuvola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/52921267037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6385/9617/files/kugupel.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6149 5060 bytes
SHA-256: 970d2fbb627d555ada55d0c576ac29f5a9175d8440bb372f32cc9294d20b834c
font_01_sfnt_off00007272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7272 10096 bytes
SHA-256: c50eb0dec06920aaf9ab9dc62c760a939c35a20068213b353716c8309979fa37
font_02_sfnt_off000094e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94E9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3