Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ae110b8ab20c23…

MALICIOUS

PDF

40.4 KB Created: 2020-08-19 15:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbd73e0a80f1a15d9482f363ae16ca82 SHA-1: b770957c8b824c1e80fce0687ad66ac3267e8c38 SHA-256: 14ae110b8ab20c2353e1ecb56f51315083d9ba9bb0e270d2371e1eb2eba6c9d3
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 'ttraff.com'. The document body, though heavily obfuscated, appears to contain the same malicious URL. This suggests the primary goal is to redirect the user to a malicious site, likely for further exploitation or phishing. The presence of numerous other PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to obscure the malicious redirect.

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.com/pify?keyword=mergers+acquisitions+and+corporate+restructurings+pdf
    • http://files.naturalhorseloverfarm.com/uploads/1/3/0/8/130813307/juwoberogu-basodedomadumuk-zejelaz-bovefawuz.pdf
    • http://lizalal.rachelhenson.com/uploads/1/3/1/4/131453960/wimupibixozotet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/buddhism_in_china_a_historical_survey.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94608223162.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3382/files/symphony_air_cooler_price_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/9139/3698/files/77822353179.pdf
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/1532038041.pdf
    • https://cdn.shopify.com/s/files/1/0431/5093/4173/files/52476925742.pdf
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/15055874073.pdf
    • https://cdn.shopify.com/s/files/1/0431/9599/0175/files/80290802970.pdf
    • https://cdn.shopify.com/s/files/1/0435/9343/3246/files/catecismo_de_confirmacion_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/tifagokuxulovavuv.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_off00006019.bin
5c8f670af50abab767cccde7d25b9de9c129fe0b1a4503ed212a0b6437cea265
pdf-font-stream PDF embedded font (sfnt) at offset 0x6019 5420 bytes
font_01_sfnt_off0000729f.bin
930657cc2883ec1f3b9443ca2265eb3c11d745cd7b704b474ae396851adf8b65
pdf-font-stream PDF embedded font (sfnt) at offset 0x729F 9900 bytes