Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa6a77836a04be7…

MALICIOUS

PDF

41.4 KB Created: 2020-08-12 19:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7f58fb417debcd409f1bf059fc596f8 SHA-1: 117b02f9f6c035dd83fa71f25482b872b718002e SHA-256: 8aa6a77836a04be7433cd3329478c4b97911a522186f7ce7d394dae204814b2c
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious domain (ttraff.com). This indicates a strong intent to direct users to potentially harmful external sites. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=600va%20ups%20circuit%20diagram%20pdf
    • http://mugitemem.saukprairiehistory.org/uploads/1/3/1/4/131408100/zagiw.pdf
    • http://files.pugetsounddoodles.com/uploads/1/3/1/4/131437701/6856982.pdf
    • http://kowivak.firstmatemarine.com/uploads/1/3/0/8/130814328/zawoxegabur.pdf
    • http://tefage.wolcottlmc.com/uploads/1/3/1/4/131453501/wukapapuwozebol-danebipefirulo-bibudezenosigi-pipezaxi.pdf
    • http://files.beginwithyourskinmedspa.com/uploads/1/3/1/8/131858481/462de.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xiguxalenagidofivixonagez.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/68539324644.pdf
    • https://cdn.shopify.com/s/files/1/0446/9896/0026/files/how_to_create_a_discord_channel.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/telecharger_des_journaux_algerien_en.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1323/files/tecnologia_assistiva_para_deficientes_visuais.pdf
    • https://cdn.shopify.com/s/files/1/0433/4003/8298/files/xabaka.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/rofojubiguxujepuxifajozef.pdf
    • https://cdn.shopify.com/s/files/1/0428/3006/9927/files/adjetivos_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/hernia_post_incisional.pdf
    • https://cdn.shopify.com/s/files/1/0431/8045/8144/files/16026748516.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/capstan_and_turret_lathe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/sozilorigaxusasewata.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/runozemaguponasuxola.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000629e.bin
b663bb69c885cdeb3df7b145cf4dae1f8d11586bbe33f70cf23f39e7fb78695b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629E 5704 bytes
font_01_sfnt_off000075e5.bin
155783a25b2b91450d8816faf5a25799b6e737973c96e892a877eeeb3c8a7747		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E5 10160 bytes

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