Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa7164cbada18f0c…

MALICIOUS

PDF

46.7 KB Created: 2020-08-04 16:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 870b8665a5158a414e02feec74caa4e8 SHA-1: 86c46644215f5519dcec03fcd118e91631818419 SHA-256: aa7164cbada18f0cdc66c1c0be7276a91c15f5563d940f511e4fdf449f6f05be
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector, indicating a phishing or scam attempt. The document body text, though heavily obfuscated, contains keywords related to 'dog vaccination card pdf' and the malicious URL, reinforcing the lure. The presence of numerous external PDF links suggests an attempt to distribute content or traffic through a link farm. No scripts were extracted from this sample.

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=dog+vaccination+card+pdf
    • http://files.chicagorhythmics.com/uploads/1/3/1/6/131606121/gijiviterut-fexole-zofuzifuvoliwot.pdf
    • http://files.administrativebee.com/uploads/1/3/0/7/130740521/lujasadixotasulonix.pdf
    • http://files.silvertonffa.com/uploads/1/3/1/3/131383747/geruno_penuvok.pdf
    • http://files.mkgeducation.com/uploads/1/3/0/7/130776657/1574671.pdf
    • https://cdn.shopify.com/s/files/1/0436/3173/9033/files/system_analysis_and_design_example_project.pdf
    • https://cdn.shopify.com/s/files/1/0447/6734/6839/files/enciclopedia_de_aperturas_de_ajedrez_sahovski_informator.pdf
    • https://cdn.shopify.com/s/files/1/0437/5235/8049/files/somajadilalexukexamojesu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2546/files/pdf_reader_annotate_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/5663086819.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1126/files/95303877103.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/14892536735.pdf
    • https://cdn.shopify.com/s/files/1/0433/5265/3973/files/jamegutudabinofa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4924/files/tagaloruseloli.pdf
    • https://cdn.shopify.com/s/files/1/0428/9249/2963/files/52589313014.pdf
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/36182299675.pdf
    • https://cdn.shopify.com/s/files/1/0431/2789/8268/files/76322348636.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_off00007805.bin
1de2dcda9820c9ece090c33ac86250050c6940016aa1277b2d4d92f67260d770
pdf-font-stream PDF embedded font (sfnt) at offset 0x7805 5172 bytes
font_01_sfnt_off000089c3.bin
4d9bfdc2cb2401e58a03821e3baa9ea4dce8711ecb7fb21369b9d8368f0abdbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x89C3 10872 bytes