Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa305af38e90e0f…

MALICIOUS

PDF

46.1 KB Created: 2020-08-22 16:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5003377cb49d8d99ba5d4858751c14f3 SHA-1: bbbaf4e9fcbd948220b3e2db22e7af539853f963 SHA-256: 3aa305af38e90e0fe473045d76ebf4265c5c211a19d17fa08276331f2a572371
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=fannie+mae%252F+freddie+mac+guidelines', is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to 'Fannie mae/ freddie mac guidelines' and the wkhtmltopdf application, suggesting a lure to disguise malicious content. The presence of a link farm further indicates an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=fannie+mae%252F+freddie+mac+guidelines
    • http://files.stloop.com/uploads/1/3/1/4/131438509/61e0d4e90.pdf
    • http://gefok.crosbyirontonmusic.org/uploads/1/3/0/9/130969352/nasugaxufupa.pdf
    • http://niwamixag.standishbiblechurch.org/uploads/1/3/0/9/130969191/fexededubetedeb_womobufimenilur_nemobivi.pdf
    • http://guxexi.clockvisualdesigns.com/uploads/1/3/0/7/130776659/mirenesewoxamogow.pdf
    • http://files.chaunceyrasmussen.com/uploads/1/3/2/6/132680813/17ec9b.pdf
    • https://cdn.shopify.co
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/tapozotavufaxobuxofip.pdf
    • https://cdn.shopify.com/s/files/1/0437/9341/6349/files/form_abstract_nouns_words.pdf
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/39974569450.pdf
    • https://cdn.shopify.com/s/files/1/0434/6111/6064/files/97339562896.pdf
    • https://cdn.shopify.com/s/files/1/0439/5555/2414/files/akhiyon_ka_yo_kajal_song.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2738/files/90610705586.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/zutatinib.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3831/files/cch_federal_taxation_comprehensive_topics_2015.pdf
    • https://cdn.shopify.com/s/files/1/0437/6251/6122/files/30403471096.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/terijovedarofexiverux.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/manual_de_automatismos_electricos.pdf
    • https://cdn.shopify.com/s/files/1/0431/9589/1871/files/powozasemiku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/68779000476.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_off0000761d.bin
b73885fd97a73321660d20e46eacbebe3eca3e83cbc0e6659b0ee55d6a967edf
pdf-font-stream PDF embedded font (sfnt) at offset 0x761D 5332 bytes
font_01_sfnt_off0000882e.bin
9c7dac97fb0bc1ecd84b31d39aa9f4eb60af27f24db325a81729f8fc8af164fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x882E 10132 bytes