Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f198f5fd5baf40f…

MALICIOUS

PDF

46.5 KB Created: 2020-08-31 19:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f89da286eec012d5dd6530cafde21160 SHA-1: 3a301da678fa885344bfc44e6469e07f1d00fa04 SHA-256: 0f198f5fd5baf40f809c745fca554709d3c928b1ce2a2c7efa73ce445fe6e87e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.club, which is likely used to host phishing or malware delivery sites. The document also exhibits characteristics of a link farm, embedding numerous links to external PDFs, many of which are hosted on Shopify. The primary malicious link is presented as a 'bloodborne pathogens osha fact sheet' to deceive users into clicking.

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.club/wix?keyword=bloodborne+pathogens+osha+fact+sheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/aadukalam_audio_songs_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/muguxinurasemex.pdf
    • https://cdn.shopify.com/s/files/1/0430/1275/1523/files/faguwisixotaran.pdf
    • https://cdn.shopify.com/s/files/1/0437/9806/9410/files/wow_6._2._3_patch_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3464/files/hkkimine_triistad_wifi_parool.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7980/files/44575410036.pdf
    • https://cdn.shopify.com/s/files/1/0434/5341/5576/files/tabutexatagudixasowinowu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/bodixomoxelotarujugej.pdf
    • https://cdn.shopify.com/s/files/1/0435/9074/6271/files/wodufezizinokif.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/72988665686.pdf
    • https://static.usrfiles.com/ugd/d55797_a987c26914764af3889cbc2c23cda473.pdf
    • https://static.usrfiles.com/ugd/07625c_030739f956f64b85971db75d8d36ffff.pdf
    • https://static.usrfiles.com/ugd/278743_a0b9aefa1508467b8a4a8ab0bd3f2a4b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bba8d13ded44810878cf5388918b311.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_off000077d1.bin
052cd1f877ba3fb534ae0ff7479f882c0c7d398394ee0b0aec6039815741dae1
pdf-font-stream PDF embedded font (sfnt) at offset 0x77D1 5604 bytes
font_01_sfnt_off00008ad6.bin
7351af71174a89129670eba55b92708cfbfa1c9086592ecea8fc144ef935e4a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD6 10116 bytes