Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e8cb0844b3c72a…

MALICIOUS

PDF

41.6 KB Created: 2020-08-22 20:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 23deed1a829b233421ba3d552068a110 SHA-1: 97468af175adbb3b610afbedc68a12bd24113702 SHA-256: f2e8cb0844b3c72a0a5774184f35e9782355a062141189610b432995b993ee16
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.cc, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains references to 'android mobile mmorpg' and a URL that appears to be part of a link farm designed to attract search engine traffic. This suggests a social engineering tactic to lure users to malicious content. 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+mobile+mmorpg In PDF document text
    • http://files.foxchapelnewcomers.org/uploads/1/3/1/4/131407734/xatoxerejafej.pdfIn PDF document text
    • http://numuwulir.information4felons.com/uploads/1/3/2/6/132695601/sexulotarawu.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/1/0431/8180/1629/files/bivepumov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5207/1074/files/convert_kindle_ebook_to_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2459/6642/files/tajusidokofipulofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2071/4137/files/52473442495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/analisis_financiero_horizontal_y_vertical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6915/2163/files/80s_country_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1832/8991/files/git_xcrun_error_invalid_active_developer_path.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/63961784763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/fallout_4_trip_to_the_stars.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/4902/7493/files/cantilever_footing_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3862/9275/files/2018_chevrolet_equinox_owners_manual.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 8

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_off00006636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6636 5020 bytes
SHA-256: 21b8aa6ce5e288d339ed1caa2e63152b45644d81c0c6d0dba50afee65b40ea9a
font_01_sfnt_off0000772e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772E 10180 bytes
SHA-256: 4d417ab299d48bdcc0136863deb9ea2ba1318a5b162349a3afb1b560045bfbd5

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