Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae71e53df0b0bfdd…

MALICIOUS

PDF

41.3 KB Created: 2020-08-19 19:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d83a65d005341fe8fab4c293e7d4e950 SHA-1: e0ffd77b4c37c9ecd00f38838ffb0f7cd509a497 SHA-256: ae71e53df0b0bfddd60a9825dc3ae78eaa05d549f92b937c58d4b278f5680715
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm. One critical heuristic indicates a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The ML classifier strongly flagged this PDF as malicious.

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=android+apps+free++apkpure In PDF document text
    • http://veromanav.charlotte-iphone-repair.com/uploads/1/3/1/4/131452903/rozanone_niwodugamo_xuxorojizezedez.pdfIn PDF document text
    • http://puvitine.rockheightsvacationrental.com/uploads/1/3/1/0/131070934/4119553.pdfIn PDF document text
    • http://files.buttonapparel.com/uploads/1/3/1/4/131438282/lisufiba.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/1/0433/6533/5208/files/21838762406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/41634716493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sebifoxof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/killer_bean_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/zosisesikeniwipilexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/60252229376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3339/5351/files/91748741951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7773/8399/files/226694049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/sajinisawilezujolipeposig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4890/2556/files/tezenowope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/85531784162.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 3

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_off000063ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FF 5056 bytes
SHA-256: 1aa1b9d2c58b59e5c46885c34c1bf9c25e157c31d0ad4bbc36fa81ac52783f02
font_01_sfnt_off0000753d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x753D 10700 bytes
SHA-256: 743f53f1aa1060a974ddc97bca322ef3097dd3111eb6324119fecbcb81370b05

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