Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd823a423eb13d40…

MALICIOUS

PDF

54.9 KB Created: 2020-08-17 04:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8f355ebd00514d203051d6d5cef356f SHA-1: 963164814a9539efa3df0b615824fb0a3535f1b0 SHA-256: fd823a423eb13d40b7b58b6c84ea660005b46f3899b9c31ae0fdbe052777f23b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.ru/pify?keyword=cg+comedy+video+hd+2019'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external PDFs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, also contains the primary malicious URL. This suggests a phishing or redirection attack aimed at leading users to malicious infrastructure.

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=cg+comedy+video+hd+2019
    • http://files.anindodeyphotography.com/uploads/1/3/1/3/131381539/zomexokuxalotuwel.pdf
    • http://guvusi.frankieannette.com/uploads/1/3/2/6/132682565/a99eeb9.pdf
    • http://files.miskatonic-journal.ca/uploads/1/3/1/8/131871994/sosebu-rapanufozagoxax-rugeruvum.pdf
    • http://files.wishingchairshop.com/uploads/1/3/1/3/131378985/retasaxajinowidow.pdf
    • https://cdn.shopify.com/s/files/1/0430/7605/9290/files/best_public_ntp_server.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8182/files/squat_form_gif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16481260084.pdf
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/75307492972.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/ford_4500_backhoe_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/5823/3493/files/gabedotoravikiwajegum.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/tusavubelebajepowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93336639176.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/77841113467.pdf
    • https://cdn.shopify.com/s/files/1/0430/2526/8889/files/voribajezafofedoguretekif.pdf
    • https://cdn.shopify.com/s/files/1/0429/6831/8105/files/helix_antenna.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/mercado_bursatil_en_mexico.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_off000097b2.bin
3c9764410bb87a2d82c5be450166ad71b341271d49696b03501ee787cc63915b
pdf-font-stream PDF embedded font (sfnt) at offset 0x97B2 5388 bytes
font_01_sfnt_off0000aa02.bin
9cde5e5d72c58b8247e11a913c8d8723975f1fe0cc179700aba7f02abc10f847
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA02 10748 bytes