Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1b6e8c8fbf77a3…

MALICIOUS

PDF

40.2 KB Created: 2020-08-05 22:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c9234d591891ecf72064a198cf3e1ce SHA-1: a11e0f7985bee82f07efa0e65c52f87bcb6542eb SHA-256: 7f1b6e8c8fbf77a3960a56be05d59c762b515cba80ceac02cf54cc2d130b8d10
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=diphyllobothrium+latum+ciclo+de+vida+pdf
    • http://files.classwithchris.com/uploads/1/3/0/8/130874457/wopogoxijukarodu.pdf
    • http://files.newmexiconeuromuscular.com/uploads/1/3/1/6/131607374/1223425.pdf
    • http://files.organicallyhers.com/uploads/1/3/1/3/131398075/zutesononadu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5671/files/84108413636.pdf
    • https://cdn.shopify.com/s/files/1/0438/9748/7512/files/jojuvameguvofukibuwef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/581871399.pdf
    • https://cdn.shopify.com/s/files/1/0437/3266/4481/files/pafojizawaxusur.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/stud_bolt_dimensions.pdf
    • https://cdn.shopify.com/s/files/1/0436/7994/0761/files/kitemikojofukofuwubabaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/65568673559.pdf
    • https://cdn.shopify.com/s/files/1/0434/4440/4374/files/5545780006.pdf
    • https://cdn.shopify.com/s/files/1/0429/8145/8069/files/2381485983.pdf
    • https://cdn.shopify.com/s/files/1/0431/6348/4315/files/3932021203.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/juvajiri.pdf
    • https://cdn.shopify.com/s/files/1/0437/8702/6581/files/wowirotubetug.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_off00005efe.bin
0313d3e43fa8eb0809370fe2a3c9b915bd853faf6b27d16c2edad34f9b04928a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFE 5520 bytes
font_01_sfnt_off000071a3.bin
196247182781a81901a05ea6ad83f23f2e57ab0749908cf642e8e1879c98f92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A3 10004 bytes

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