Malicious PDF — malware analysis report

Static analysis result for SHA-256 fede9c729d354ad2…

MALICIOUS

PDF

39.6 KB Created: 2020-08-22 03:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7f9846ef9a91132245e907da8b0928f SHA-1: 1492ecb884cca500d106caa7cebb1fad32847585 SHA-256: fede9c729d354ad29cf2c80b5698c290785686ee83a57b7ea27c7c2d3bc988c9
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains a string that appears to be a lure for a 'pdf annotator android free' application, which is then followed by the malicious URL. The PDF also contains a large number of embedded links, many of which point to Shopify domains, likely as part of a link farm to improve SEO for the malicious redirector. The ML classifier also 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.com/pify?keyword=pdf+annotator+android+free In PDF document text
    • http://files.littlepieceofmyheart.com/uploads/1/3/2/6/132681501/495c1.pdfIn PDF document text
    • http://files.bawathitchurch.net/uploads/1/3/1/3/131380600/dadinebe.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/1/0434/6619/5106/files/12284695979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/pan_card_application_form_2020_latest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4864/8354/files/wikovazizedisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1679/8886/files/anti_tpo_test_full_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7650/2175/files/22454361260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/zuzep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9768/5157/files/gijeminuribusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6225/3982/files/english_grammar_tenses_in_sinhala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1466/5878/files/vororebixofexejowagiret.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 6

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_off00005f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F67 4692 bytes
SHA-256: 956cc692ff10f78cf976a4c3f755cbc71dfeac9057ab03857ead6f3ca77d7d08
font_01_sfnt_off00006f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F66 10016 bytes
SHA-256: f49c40712c4759ccb498e167d922401bfa5a539e885721ea281a3b410c8d5914

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