Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b4253bc92505e5…

MALICIOUS

PDF

55.5 KB Created: 2020-08-01 12:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06c4af18c1334720a3d6f739186f0091 SHA-1: dc2cd69dca9f98a076661efcb2e80eed71b3c447 SHA-256: 68b4253bc92505e560a35a82ea35e50db71a5848a3ff5eeebe0a124635993702
154 Risk Score

Malware Insights

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

The PDF contains a link that directs to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs hosted on Shopify, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion of a 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=kappa+alpha+psi+scroller+manual
    • http://files.lavapeakbengals.com/uploads/1/3/0/7/130739918/xabapubaga_zidanozinaj_jixunowowu_wifejigozowe.pdf
    • http://files.benedictinefarm.com/uploads/1/3/1/4/131438245/gekojexupakuwuvoxe.pdf
    • http://files.zoezimski.com/uploads/1/3/1/4/131454850/9df4d0ba26a5d8.pdf
    • http://files.artimc.org/uploads/1/3/2/8/132815054/1033862.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/zavukuriwukeviradaviremof.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/vunivuwamulagafikir.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/tusigulanugolusegebi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9534/1723/files/xidakijekorasoxusaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3282/1412/files/35264108025.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/87367485282.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/denalimiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2753/7828/files/9572560444.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/52196977769.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/19560769790.pdf
    • https://cdn.shopify.com/s/files/1/0431/1577/4108/files/59624421539.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_off00009a1e.bin
aa3df84f7d19b313e72b53ad9932df5934c33efaea49c82a90864b1715c35351
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A1E 5144 bytes
font_01_sfnt_off0000ab73.bin
1b285e5b39ce6b064df871f00fd4d2481f5c62da5a856baec227271f17350857
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB73 10672 bytes