Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94d2d0449f61f77…

MALICIOUS

PDF

36.9 KB Created: 2020-08-22 20:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a381c27fbc2c3b2886797a28bdbb925e SHA-1: bb5ca006c95b8002a044a6b5c623d5557f3823f6 SHA-256: d94d2d0449f61f7713a6882c229b2653c8b36707b55dacfbee58fcf8f7d27afc
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body contains the text 'B p l ka full form' and a URL that appears to be a lure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=b+p+l+ka+full+form, which is flagged as a malicious redirector. The presence of numerous links, including to Shopify, suggests an attempt to create a link farm for SEO poisoning or to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=b+p+l+ka+full+form
    • http://wumusofu.adamhamdy.net/uploads/1/3/1/3/131383652/fbfb6fc.pdf
    • https://cdn.shopify.com/s/files/1/0428/1935/4791/files/automobile_engineering_book_by_vijayaraghavan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kovogosiwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/foliv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5332/6241/files/pradeep_chemistry_notes_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/for_since_already_yet_just_still_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/nusagozap.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1356/files/sabitik.pdf
    • https://cdn.shopify.com/s/files/1/0432/9350/7737/files/free_rotational_symmetry_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/mefuvidilefupumojesigod.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3397/files/fuzoreg.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_off000048e0.bin
ee51be534fbb87fb0415675993a5c29b22193dae20a3142a6f95ab63d65f0590		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48E0 4512 bytes
font_01_sfnt_off0000582e.bin
5cac724ecfd6cff5f0b80003f8eb391ce63cb0915084d081f5881fb492ded732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x582E 9644 bytes
font_02_sfnt_off0000791f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791F 4324 bytes

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