Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca1e76829569746…

MALICIOUS

PDF

43.8 KB Created: 2020-08-19 15:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 671e6f7ab11ac8fd0d93234a63f35c7d SHA-1: 6f623fab74d99c2f745c41f45075dae952564b99 SHA-256: 2ca1e768295697463dc4e1a1ae8415efebd49ff78fab3e29d33f55811a374ac4
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting seemingly benign PDFs. However, one critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though partially corrupted, contains text related to 'Accidente cerebrovascular en perros pdf' and the malicious URL, suggesting a lure to a malicious resource disguised as a PDF. The presence of numerous links and the redirector indicates a link farm or SEO poisoning tactic to distribute malicious content.

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.cc/pify?keyword=accidente+cerebrovascular+en+perros+pdf
    • http://bibad.swindoncabs.com/uploads/1/3/2/6/132681670/1602910.pdf
    • http://lajalo.ourladyoflourdesharrisonville.org/uploads/1/3/0/7/130739240/zukera.pdf
    • https://cdn.shopify.com/s/files/1/0432/4383/1458/files/acupuncture_meridian_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/6758645900.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5241/files/16222556389.pdf
    • https://cdn.shopify.com/s/files/1/0441/1876/9816/files/38351127751.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/76059908694.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/50937854787.pdf
    • https://cdn.shopify.com/s/files/1/0431/3625/4101/files/lilukidaxemevajakina.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9073/files/weget.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2831/files/alcoholismo_en_jovenes.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5628/files/pavasobokamegovadovejiros.pdf
    • https://cdn.shopify.com/s/files/1/0451/3182/5317/files/free_baby_moccasin_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/34316624734.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/alagappan_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/40596194544.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/bronchopneumonia_in_pediatrics.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_off00006cb0.bin
864ff33d857caf1d4c9314c989b5a429a5d01a36bb076931b2d8749a5a1790c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB0 5340 bytes
font_01_sfnt_off00007ed7.bin
140a3f6477213174c1cab5819dc83c487610a6f56c123685299fff2277a56163
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED7 10912 bytes