Malicious PDF — malware analysis report

Static analysis result for SHA-256 44da8d8e98840c54…

MALICIOUS

PDF

112.3 KB Created: 2020-08-04 11:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2462ec8e12e1d0430feed5fade04de86 SHA-1: 73b7fea29425dce8425c07b8c7abfc489c478b2a SHA-256: 44da8d8e98840c54763fbe080154a25c4eed65de9fa8ff55e7f6fa66ba63e896
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'Canon eos 5d mark ii manual pdf' and a URL that appears to be part of a link farm designed for SEO manipulation. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector is likely a user being tricked into clicking the malicious link.

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=canon+eos+5d+mark+ii+manual+pdf
    • http://zokofor.fridaymarineworks.com/uploads/1/3/1/4/131407089/1409067.pdf
    • http://files.garlandcountyvote.org/uploads/1/3/1/4/131408970/7685113.pdf
    • http://files.lakeodessaarts.com/uploads/1/3/0/7/130738892/8701533.pdf
    • https://cdn.shopify.com/s/files/1/0432/8475/8696/files/wopekipobisikujol.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/46698250313.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/81366639312.pdf
    • https://cdn.shopify.com/s/files/1/0429/0589/5075/files/vocalsynth_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/49792586520.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71895705060.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2557/files/99684881893.pdf
    • https://cdn.shopify.com/s/files/1/0432/5474/3200/files/6808185462.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/xipasufotevo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9486/6088/files/sesunavezevepabofi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/zemobiroxineva.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/waxazefoselajofadomunul.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/govomadasabazumolawibi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017167.bin
3212128a9943d1a02df75350a0088e9dd3646dc8b78e4c3bbd2db0d979e3d2db
pdf-font-stream PDF embedded font (sfnt) at offset 0x17167 5280 bytes
font_01_sfnt_off00018348.bin
7b1136385a369e2743267a85d41985cafdb757078d23c7f9ae6a49d8a173c251
pdf-font-stream PDF embedded font (sfnt) at offset 0x18348 15604 bytes