Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6804e77b7021f5…

MALICIOUS

PDF

43.7 KB Created: 2020-08-10 05:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0432170036cfc5a9ceab26a6a8c5fbaa SHA-1: ff01df71e3dcf672dbafc0f9c6e3259590a459e8 SHA-256: de6804e77b7021f5d0b7aad73f2ac2bc4df68991b89424275870f7294ad7e1d5
150 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding a large number of external links, predominantly to Shopify-hosted PDF files. One of these links, found at https://ttraff.ru/pify?keyword=basic+hardware+parts+of+computer+pdf, is identified as a malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, potentially for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=basic+hardware+parts+of+computer+pdf
    • http://golugimow.miweddingpainter.com/uploads/1/3/1/4/131453109/957643.pdf
    • http://files.taffycorbettdesign.com/uploads/1/3/1/6/131636737/68315b222caf8e9.pdf
    • http://files.miriammccormick.com/uploads/1/3/2/8/132815882/d870ae05d1a5.pdf
    • http://files.jacksonvilleartistsguild.org/uploads/1/3/0/8/130813108/3553427.pdf
    • http://files.thegeekyside.com/uploads/1/3/1/4/131452872/24daa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9471/9131/files/astm_a53_standard.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/rixizowusawusuvizut.pdf
    • https://cdn.shopify.com/s/files/1/0435/8589/6609/files/blue_moon_of_kentucky_chords.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/urbanismo_ecologico_salvador_rueda.pdf
    • https://cdn.shopify.com/s/files/1/0446/6507/7913/files/3d_maker_v3_for_autodesk_revit.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/divuxugavemepiki.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/pdf_to_black_and_white.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/bazironekomag.pdf
    • https://cdn.shopify.com/s/files/1/0432/4196/3679/files/9571585681.pdf
    • https://cdn.shopify.com/s/files/1/0444/3789/7383/files/secret_organization_name_generator.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/99158499217.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_off00006aed.bin
a84bc0cdc11321e793ae7b28113e883bebc709b02b5180936609a46435356eba
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AED 5504 bytes
font_01_sfnt_off00007d93.bin
43e867116d980d90945a695b67d931591681582212b303bc77dbc628fdb42595
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D93 10588 bytes