Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef8a1374d15a096e…

MALICIOUS

PDF

47.7 KB Created: 2020-08-03 16:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e481f796b37ebbe7e823cb8cdcae3d38 SHA-1: e6b0274f8c33117b8fb1006695d1c66917d45baf SHA-256: ef8a1374d15a096e391cc0bb6ac31d21e6473a8a848b42b89e16c7832d2b8c83
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to distribute the malicious document. 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.com/wb?keyword=vulgarisation%20scientifique%20mode%20d%20emploi%20pdf In PDF document text
    • http://files.oakstreetnurseryschool.com/uploads/1/3/1/8/131871740/5096382.pdfIn PDF document text
    • http://files.javiatorsim.com/uploads/1/3/1/6/131637658/b4449f8ed62e8.pdfIn PDF document text
    • http://files.angelamedinagarcia.com/uploads/1/3/0/7/130739727/koxigezukiwuvetesob.pdfIn PDF document text
    • http://files.996makers.com/uploads/1/3/0/7/130739385/18877837f29e.pdfIn PDF document text
    • http://www.scienceetpartage.frIn 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/1/0428/2885/7503/files/zixozesoliwama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/tangled_the_series_season_2_episode_16.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7646/0448/files/fovebotevatisudilaliwofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/34070323791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2703/8369/files/vopogibod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/zonulifuwobaxoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/avenged_sevenfold_dear_god_lyric.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9422/6584/files/zomiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/siranemukuluwezorudajumuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/70229282626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/fufufavatinonadixitazowul.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A5 5448 bytes
SHA-256: 53d0b4b53d09d1785d3ac5f1e616bbbc83ca59e50554c18a6cefff9041b4b940
font_01_sfnt_off00007506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7506 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00007d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D93 11472 bytes
SHA-256: ae980615105c33d380734abc73d08ec2536ed68757199698f892f1041ebe8c39
font_03_sfnt_off0000a180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA180 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3