Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf4145ee02bd7d2…

MALICIOUS

PDF

54.9 KB Created: 2020-09-01 11:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59174de0590dfd3030d72e6a2c1eb47f SHA-1: 2af72aad6a71459f1a447bae0c65ffcc546d1573 SHA-256: 0cf4145ee02bd7d2c27db9f8958f8724db28d73785d4eb4db9dd3c89c15be6bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is designed to lure users to malicious infrastructure. The document body, though heavily obfuscated, contains the same URL and appears to be a lure disguised as a spec sheet. The presence of a large number of external PDF links, many of which are benign, suggests a link farm or SEO poisoning attempt to increase the visibility of the malicious redirector.

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.club/wix?keyword=isilon+spec+sheet+a200
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/a467d2_75ef9629875e4297b840ce5c62ab6d89.pdf
    • https://static.usrfiles.com/ugd/b8c837_9484169f27cb4bb9ba43388afdc33d1b.pdf
    • https://static.usrfiles.com/ugd/61804c_2bdacdd3c0ce46e6ac3e35102b35d946.pdf
    • https://static.usrfiles.com/ugd/10a4aa_1850c1771a524eb784d10b7e58204d0e.pdf
    • https://static.usrfiles.com/ugd/d1d005_38bf9144350f4c4cbf15a8d63c2ef41a.pdf
    • https://static.usrfiles.com/ugd/b8c837_29d012bf2c4844658994e1a5db8f2014.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ccb5ea8cdb44725bedef22c87e40fed.pdf
    • https://static.usrfiles.com/ugd/d5415a_f3acf857703f44d4a2fc27ec459bf52d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b78055f4d46e43aabdc759bd590ecc76.pdf
    • https://cdn.shopify.com/s/files/1/0433/9744/7836/files/hybridization_techniques_in_plant_breeding.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71895612735.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6936/files/lawewejojawavefiwofuke.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cda.bin
e421e6128506f195716978bf2bd71acee632f21f617678fafef1da0326cf1dd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDA 4924 bytes
font_01_sfnt_off00008d7d.bin
18ca0606a6c505955754de459c3b8d9951b1028625c430ae5585af4987e75da4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7D 16196 bytes
font_02_sfnt_off0000bfb8.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB8 4324 bytes