Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a2f8441a5953c8…

MALICIOUS

PDF

32.5 KB Created: 2020-08-25 12:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c655469ff5dd8ad52da381ca76d6455 SHA-1: ef2c363252eb061280fceea94225d8d873f122d4 SHA-256: 57a2f8441a5953c854355c140c138faf7730a5e45540fae31944d5297a3348f6
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=elika+460+spec+sheet'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking Shopify URLs, suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=elika+460+spec+sheet
    • http://zofibek.bellringeratx.com/uploads/1/3/0/9/130969465/8327643.pdf
    • http://bodil.steveayottemusic.com/uploads/1/3/1/1/131164079/6656202.pdf
    • http://files.lenoratrussell.com/uploads/1/3/0/9/130969562/wijagizufan-setod-sotivanuwaxapa-nofuxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/kci_wound_vac_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/2081/2441/files/occurrence_at_owl_creek_bridge_text.pdf
    • https://cdn.shopify.com/s/files/1/0434/5757/7122/files/34610531519.pdf
    • https://cdn.shopify.com/s/files/1/0429/2886/5446/files/82051976508.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/47721734190.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/17883298493.pdf
    • https://cdn.shopify.com/s/files/1/0438/2969/0525/files/82763937037.pdf
    • https://cdn.shopify.com/s/files/1/0441/0467/9576/files/12236331288.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/72455211728.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_off000042b6.bin
0187d1df42bbb59b4bbcd3fe28317e4ed56f6a7bf8639caeca2a9223933c54ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42B6 5332 bytes
font_01_sfnt_off000054cb.bin
08c8079b596db3b6939678b7b9add82571345c2fcd6239ae115687da54628529		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54CB 9648 bytes

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