Malicious PDF — malware analysis report

Static analysis result for SHA-256 7514622f1cd007d8…

MALICIOUS

PDF

65.2 KB Created: 2020-07-25 01:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a3c53628b68f0ccd213c8ba0cfb6b9c SHA-1: d0b71ae919676ca28e3fd783a25030c2f27a0655 SHA-256: 7514622f1cd007d88acdca172fda3ad67049fc7332f82d80c7bc8f3bc2ebe5cc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm, with many links pointing to Shopify domains, likely to obscure the malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector suggests the document's purpose is to lure the user to a compromised site.

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=chmod+operation+not+permitted+android
    • http://files.focused-fitness.com/uploads/1/3/1/1/131163601/wudazogerunorugaladi.pdf
    • http://files.melissajarboe.com/uploads/1/3/0/7/130776720/3d1c1b79.pdf
    • http://files.mariaapostolopoulou.com/uploads/1/3/1/6/131636689/dcfbd562f6a.pdf
    • http://files.mar
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/86688048826.pdf
    • https://cdn.shopify.com/s/files/1/0434/6786/6278/files/zalekuzabedewowo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tizerosotusalasebix.pdf
    • https://cdn.shopify.com/s/files/1/0430/3175/6957/files/2731603167.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/83741907486.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/gokozegazozode.pdf
    • https://cdn.shopify.com/s/files/1/0438/0377/1041/files/minodaduzero.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/wamajonikivirolitowibi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/nopivapoxamuzugab.pdf
    • https://cdn.shopify.com/s/files/1/0429/6399/2742/files/dakipevuxepuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/zigokogitexexuxupulijex.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061b8.bin
4d9e8bc0316c23bf9c28a761a6f0c2e53de6bfa7d0926ba41d54e5d25ebee545		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B8 23652 bytes
font_01_sfnt_off0000ac25.bin
1b95f87bbe04bda602c7748b0eb1f0d422c3ce2369a0fff8a5d6e3e905369581		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC25 4800 bytes
font_02_sfnt_off0000bc48.bin
e72af92f5cd70664e936dfce881a6b7989326533320caaeaee7069111e3458f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC48 11084 bytes
font_03_sfnt_off0000e23b.bin
84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE23B 16060 bytes

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