Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5d47221eed2c76…

MALICIOUS

PDF

45.4 KB Created: 2020-08-07 08:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 743617e32fa4cd09702410af46c1698d SHA-1: 09b13febf1879187fe6c4870fc595932870e9d2f SHA-256: 6c5d47221eed2c76c463ce13da3484f78216340cdc883c69553bea3403fa07b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. Additionally, it contains a mass external PDF link farm, with many links pointing to Shopify-hosted PDFs. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be SEO manipulation or a link farm designed to distribute malicious content.

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=batuan+sedimen+silisiklastik+pdf
    • http://fitif.sheamccarthy.com/uploads/1/3/1/3/131398020/lizumirarot.pdf
    • http://somuxuko.colebrookwoodcraft.com/uploads/1/3/1/3/131383314/3948515.pdf
    • http://files.blwcenter.org/uploads/1/3/1/0/131070561/d954507.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/mevajupaneruwuxukepaziw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7351/files/23239966612.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/mimof.pdf
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/38356135799.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/66342473046.pdf
    • https://cdn.shopify.com/s/files/1/0434/7936/7845/files/5851115482.pdf
    • https://cdn.shopify.com/s/files/1/0437/7978/4866/files/jijaxinuzejigedunisibupu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/roku_com-_link._appspot_flickr.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6589/files/xukodukovadavafa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/tratado_de_anestesia_regional.pdf
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/34653010894.pdf
    • https://cdn.shopify.com/s/files/1/0435/3009/2712/files/peter_drucker.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f71.bin
dffa25e1ef269d291aff5547a6fd46c5c8c57dac0f33a47ed4e869402e14c849		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F71 5204 bytes
font_01_sfnt_off00007119.bin
81a0a621f2fa46b60a0412d769ad122c2499aeda543af59a195e58e594cc4f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7119 9880 bytes
font_02_sfnt_off000092f7.bin
069f5cdcb972b33999f3dc18a3e5b847fc2aa024b7c5b45b4734cedf253a8e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F7 16376 bytes

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