Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a41f3d247c62eb9…

MALICIOUS

PDF

42.0 KB Created: 2020-08-20 18:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2b52b28c1bd209e667189e2a2a0023b SHA-1: 6ca4b37ad310712ea4a11552129ea1b08dbc18bb SHA-256: 0a41f3d247c62eb998d587d7869e51ea43ac9003bdccca0132f401097ee49481
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and text related to 'ap environmental science frq 2002 answers', suggesting a lure. The presence of numerous external links, many pointing to Shopify, indicates a link farm strategy, likely to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=ap+environmental+science+frq+2002+answers
    • http://files.reascanvasandmore.com/uploads/1/3/0/7/130775950/f61bbc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/libro_administracion_de_la_cadena_de_suministro_ballou.pdf
    • https://cdn.shopify.com/s/files/1/0430/1144/0803/files/63086011653.pdf
    • https://cdn.shopify.com/s/files/1/0430/8067/9577/files/58530162388.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/xasotujowafalok.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/cookie_clicker_free_time_games_hack_script.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/48058645815.pdf
    • https://cdn.shopify.com/s/files/1/0440/5064/5157/files/86835168941.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8455/files/70037590372.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xiguxalenagidofivixonagez.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3755/files/97319825387.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006516.bin
1cb788e99931d1948b25a2c1af35ac47eb1567818aaee9326c2eea288ac67db4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6516 5700 bytes
font_01_sfnt_off0000787d.bin
1ed81d481239c581496109b0168fe8fd92933c287854b99cea8565a53ee8a24d
pdf-font-stream PDF embedded font (sfnt) at offset 0x787D 10216 bytes