Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f1d7623559e6943…

MALICIOUS

PDF

45.0 KB Created: 2020-08-08 00:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56f4d27990484ffef648a022e5b0b121 SHA-1: c6abaa745cf8e519e7175eb0bb161b5ed082c9a6 SHA-256: 3f1d7623559e6943f1107d1379a5cad4632b741074708e58cdde39f4d432e026
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary link, 'https://ttraff.cc/pify?keyword=best+books+on+machine+learning+pdf', is identified as malicious. This suggests the document is designed to trick users into visiting malicious websites under the guise of providing useful content. No scripts were extracted, and the document body is heavily obfuscated, but the presence of a malicious redirector is a strong indicator of a phishing or content-luring attack.

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=best+books+on+machine+learning+pdf
    • http://files.dontcrampourstyle.com/uploads/1/3/1/3/131380728/1651660.pdf
    • http://files.boshamretreats.co.uk/uploads/1/3/1/4/131483083/6796854.pdf
    • http://files.benallanoff.com/uploads/1/3/1/8/131871568/ziduxuzo.pdf
    • http://files.phoenixparkour.com/uploads/1/3/0/8/130813934/mipuxul-tirubi-zilimekenuzu-zugutirexuzon.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9651/files/meaning_of_chaupai_sahib_paath_in_punjabi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/98423146669.pdf
    • https://cdn.shopify.com/s/files/1/0432/8597/1110/files/zavarisevoturumilipum.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9610/files/dowomavodanalivipegirudor.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/58095289522.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/nebomipegurumiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/65201841036.pdf
    • https://cdn.shopify.com/s/files/1/0430/2074/6906/files/how_to_calculate_representative_fraction_map_scale.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/difuxisosux.pdf
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/beliefs_definition.pdf
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/98823301591.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bopeberovejaxurid.pdf
    • https://cdn.shopify.com/s/files/1/0438/8506/8456/files/wepidejajetodaru.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_off0000707f.bin
b635dfc5526c228272412830a1437531b4f49bd03043f9298dabdf2f8de5a9a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x707F 5820 bytes
font_01_sfnt_off0000841e.bin
1afa0dfe36b43e362457504c49de00981ddec67360332b5a86766f6b9376501b
pdf-font-stream PDF embedded font (sfnt) at offset 0x841E 10208 bytes