Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0bfbb9d35575e9…

MALICIOUS

PDF

41.0 KB Created: 2020-08-10 08:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 79658cefb9ea02483930c11292af5bc9 SHA-1: 10e982ac028c9a0de4944258a7aba6644431dda1 SHA-256: 5a0bfbb9d35575e96c8c98bf5c183a96f4bc9d2867273e86deafb4fbac944a5d
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, directing users to a malicious redirector at `https://ttraff.ru/pify?keyword=calvin+and+hobbes+pdf+collection`. This suggests the document is designed to lure victims to malicious infrastructure, likely for phishing or further malware delivery. The document body, though heavily corrupted, contains references to the redirector URL and other Shopify-hosted PDF files, reinforcing the lure. No scripts were extracted from this sample.

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=calvin+and+hobbes+pdf+collection In PDF document text
    • http://files.croberts100.com/uploads/1/3/0/8/130814466/5082944.pdfIn PDF document text
    • http://supiw.familytimefurniture.com/uploads/1/3/0/8/130814058/vaparid.pdfIn PDF document text
    • http://files.thefabriclibraryenniskillenltd.com/uploads/1/3/1/3/131398252/71f20.pdfIn PDF document text
    • http://files.shanghaiveggies.com/uploads/1/3/1/4/131438176/nolifelamemuz.pdfIn PDF document text
    • http://files.lbtdlaw.com/uploads/1/3/1/8/131856991/1a9d8099.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/1/0431/0381/3781/files/pesobabilijilitil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/86632901184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/kibuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5228/4566/files/wegobelojosisor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1215/3766/files/pinisabixipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4058/7431/files/buddhist_teachings_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/40190829449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/biozone_3_4_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/99943125875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2174/4803/files/33376948298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/modul_belajar_bahasa_jepang.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/piloruj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/43741872127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/64733079847.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6348 5252 bytes
SHA-256: 2125c40c4afb55872616fc8fc847745c1a90b864330c5d8b5e1dfb388dd65eb6
font_01_sfnt_off00007525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7525 9904 bytes
SHA-256: bb3046a83b8e58b189ec2d618517224091cf9934f0398affb00ff986a4eebc4e