Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a691b4658be5f77…

MALICIOUS

PDF

68.3 KB Created: 2020-08-01 23:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43463e10bc74ebb7eeb11d404f3aad70 SHA-1: cf57be7e9e80ba4bdae5ed73536e00b734101723 SHA-256: 5a691b4658be5f77322a515944af68b0ac8f00a51ac1fe0c3644cb7cc07af934
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to a link farm designed to host SEO-optimized PDF files. One of these links, https://ttraff.ru/pify?keyword=1996+dodge+dakota+owners+manual+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the same keyword, suggesting a lure to disguise the 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.ru/pify?keyword=1996+dodge+dakota+owners+manual+pdf
    • http://files.perryyoungblood.com/uploads/1/3/0/7/130740092/c408ac.pdf
    • http://files.iphonerepairllcmccomb.com/uploads/1/3/1/3/131398235/8662033.pdf
    • http://files.lifespiritwisdom.com/uploads/1/3/2/6/132682905/sumazi-kafasifexap-noregitobesij-paxara.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9816/7709/files/dajumafef.pdf
    • https://cdn.shopify.com/s/files/1/0430/9857/0909/files/kusaluvalizas.pdf
    • https://cdn.shopify.com/s/files/1/0436/5962/4606/files/49489564664.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/zowufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/80304283665.pdf
    • https://cdn.shopify.com/s/files/1/0431/4716/5850/files/fipezomedup.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/34299478785.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/mebomunesewalaxu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/45722879155.pdf
    • https://cdn.shopify.com/s/files/1/0429/5891/3689/files/12315645235.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/45546184867.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/83187984890.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/xozikon.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_off0000bf69.bin
bc79b1722ad8a690e5340ad0070ede1b511672a813a9556305b55fa64aabb50f
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF69 5784 bytes
font_01_sfnt_off0000d31d.bin
c29e358bda1699f9ed170818e29660a63eb9cd68fc7f0728e4d76ba00cc82072
pdf-font-stream PDF embedded font (sfnt) at offset 0xD31D 15836 bytes