Malicious PDF — malware analysis report

Static analysis result for SHA-256 858e39678ec8821c…

MALICIOUS

PDF

46.9 KB Created: 2020-09-06 08:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d2600d9d3b0007493cbe818e0198506 SHA-1: 93069fdb850b73ef6dc218cbd5cbff2cfccdb796 SHA-256: 858e39678ec8821c32a1522c718b3c7dc0f84adffa0474754f2da3b13053d15b
194 Risk Score

Malware Insights

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

The PDF contains multiple links to an SEO redirector, specifically 'https://ttraff.club/pify?keyword=no+answer+in+french', which is flagged as malicious. This indicates an attempt to redirect the user to a potentially harmful site, likely for phishing or malware distribution. The presence of numerous external PDF links also suggests a link farm tactic. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.club/pify?keyword=no+answer+in+french In 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/1/0431/5598/0450/files/bibuvakologev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/zuwamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/resurrector_mech_serum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6678/4932/files/binugaxaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/junajelow.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/353d00_b4ba64674fa54fad929351bd3eecf23c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f09a9d_d71fd9e6a4cd45999291a78bf1484049.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/afe78f_f6ce7af213df431e9426ca164f9d6d5b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3154/3463/files/karate_kid_movie_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5363/7018/files/xawojitiz.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

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_off0000648f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648F 4996 bytes
SHA-256: fd4f361d6c90c8ba1497093f4e35a98856d9a903510675c52aa10818c6ba3bf8
font_01_sfnt_off0000759a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x759A 10876 bytes
SHA-256: 12b54e53e6eb28bd8aa1c54bd5de46b5e6b20cd2d098f48135c9e0b1d1fc1cbb
font_02_sfnt_off00009a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A73 16068 bytes
SHA-256: 687267c9c3db9c7ba5925ba46e702bad05deca9442433a35c4d1c7c9873e4b92

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