Malicious PDF — malware analysis report

Static analysis result for SHA-256 688fa85274fc777f…

MALICIOUS

PDF

44.1 KB Created: 2020-08-06 05:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e753c8e5e8882715082bbf7a7282ef9 SHA-1: e7aa2f97644f4c9336cf053f33b3f8a0057e547b SHA-256: 688fa85274fc777fe132f0999ffbc7c579064f7b5e969be4c73cf46dc40a3ef9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body and heuristics indicate a lure for free PDF downloads, likely leading to phishing or malware. The ML classifier strongly supports the malicious verdict.

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=comment+apprendre+fran%25C3%25A7ais+pdf In PDF document text
    • http://files.littledenblog.com/uploads/1/3/0/7/130775373/woxuzu.pdfIn PDF document text
    • http://files.lizcolter.com/uploads/1/3/2/6/132683154/wujoxakogixij-vipamapaleb-mimugefe.pdfIn PDF document text
    • http://files.msacf.org/uploads/1/3/0/9/130968961/9063426.pdfIn PDF document text
    • http://puwuwugo.sophisticatedfit.com/uploads/1/3/0/7/130738799/fitajilexomofifubanu.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/1/0449/0254/7611/files/causes_and_management_of_stress_at_work.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4109/5834/files/42004229168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/34648759398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/14996877014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33435760041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/donobuxerukafij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/xixolakaxebemokilivovuvub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/37764391928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/29437089052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/chronic_stable_angina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/arabian_nights_malayalam_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/pujuxedokejokuxokelaluku.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_off00006ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC7 5240 bytes
SHA-256: 763bd813c326f90ca3aca957bd88699cfac8bc16a710fdafef7380bbdd16104b
font_01_sfnt_off00007c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C81 11628 bytes
SHA-256: e26b1489601d30c6f0339647dfa15f62d3d926616972d6b7083d4283e60cc8b9

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