Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab282a9683daae6…

MALICIOUS

PDF

43.3 KB Created: 2020-08-21 07:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42923a182dd514c41c291c7b9c7a9eca SHA-1: 9c8bc87e7432fb26d77dbf61f86581cb75374f06 SHA-256: 6ab282a9683daae69920c7b3136ecb0236ff6b266e5ee243224ea1d5a4b1a867
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to ttraff.cc. The document body, though heavily obfuscated, contains text that appears to be a lure for an 'Indesign diary template 2019'. The presence of many external PDF links, as flagged by PDF_SEO_LINK_FARM, suggests an attempt to distribute malicious content or engage in SEO manipulation. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

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=indesign+diary+template+2019
    • http://buvofuz.judithmary.com/uploads/1/3/1/1/131164250/9997890.pdf
    • http://files.teamstudy.org/uploads/1/3/0/7/130739766/9efe88847d7f.pdf
    • http://files.shearserenitysalon.com/uploads/1/3/1/3/131383553/53b9878d6b0f11.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/9486/6088/files/87710511387.pdf
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/kapurutelewimurisegetiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7570/6788/files/datun.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4892/files/20918375121.pdf
    • https://cdn.shopify.com/s/files/1/0432/1355/3827/files/70665439540.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/argandoa_macroeconomia_avanzada_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/teaching_business_english_lesson_plans.pdf
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/pofiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/service_host_sysmain.pdf
    • https://cdn.shopify.com/s/files/1/0432/1945/2063/files/kamula.pdf
    • https://cdn.shopify.com/s/files/1/0435/6970/9217/files/sebunorumuwusiwunazidu.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_off00005f33.bin
fafa4b298f46c37e36012f648166821a36072d940ab6bfa5710cd38ca1def13b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F33 5800 bytes
font_01_sfnt_off000072dd.bin
f6f1294be3d63b718e4a6eee761e806c045889505d97e69218a72f1dfaed1acf
pdf-font-stream PDF embedded font (sfnt) at offset 0x72DD 14468 bytes