Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a724b025a0f930…

MALICIOUS

PDF

45.7 KB Created: 2020-08-14 04:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bfb488717f0d1b87fb3b7c4f0096894 SHA-1: 58aa1bdeb56af4c217b74f94a70de98c24824f47 SHA-256: a5a724b025a0f930008fc86355c427687a04be2843120fa9876c68c0563f182a
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a treasury challan form. This suggests a phishing attempt to redirect users to malicious content. The document also contains a large number of links to other PDFs hosted on Shopify, likely as part of an SEO link farm to improve search engine ranking for malicious content. 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.cc/pify?keyword=treasury+challan+form+bd+pdf
    • http://fefes.newtonwonder.net/uploads/1/3/0/8/130814328/guwomoj.pdf
    • http://files.heavyhittersftjackson.org/uploads/1/3/2/6/132696598/jafepofuvuputisewexi.pdf
    • http://tumonos.midmoche.org/uploads/1/3/1/3/131384635/gaxinakugufemakiri.pdf
    • http://wimifeza.babymoonshine.com/uploads/1/3/0/7/130776760/5159548.pdf
    • https://cdn.shopify.com/s/files/1/0431/3530/3831/files/different_types_of_lightning_arresters.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0111/files/baltasar_ile_blimunda.pdf
    • https://cdn.shopify.com/s/files/1/0434/6062/4537/files/62398564357.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/tixexudobetazizunober.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/60358296627.pdf
    • https://cdn.shopify.com/s/files/1/0434/4309/3660/files/mpdf_border_radius_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/john_deere_970.pdf
    • https://cdn.shopify.com/s/files/1/0435/4650/9461/files/1st_grade_book_report_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/bungen_buchungsstze_mit_lsungen.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/97738797692.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6343/files/nunaxegofokexaxabetetam.pdf
    • https://cdn.shopify.com/s/files/1/0434/7206/0573/files/cambridge_certificate_in_advanced_english_2_with_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005254.bin
b3d1014b252757eb2793e14fb770f91857f87ac7b3992be89d912f2f00dc74d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5254 5588 bytes
font_01_sfnt_off0000651f.bin
16509e8a3190844545b31af3e4d8ac3cb75e160957fba61d218a388b57a69406
pdf-font-stream PDF embedded font (sfnt) at offset 0x651F 10296 bytes
font_02_sfnt_off00008600.bin
9f4f2ced4f4b4dcd5bc3435034dcd3d6335b1b8f49a57b33955dc80ba083a807
pdf-font-stream PDF embedded font (sfnt) at offset 0x8600 9636 bytes