Malicious PDF — malware analysis report

Static analysis result for SHA-256 d074171d3a01532b…

MALICIOUS

PDF

68.9 KB Created: 2020-08-17 13:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8714bc983f33191cbdc6effc42bf787f SHA-1: ae58ff74a40eb1538ecbdbb755266af6d2a47dc1 SHA-256: d074171d3a01532b01b304b9bc4877e3b7b039c0d1675189e2fa806e9a7c0eac
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=polyatomic+ions+answer+key'. This URL is embedded within the document body, disguised as an answer key. The document also exhibits characteristics of a link farm, with numerous external PDF links, many of which host potentially malicious content. The primary attack vector appears to be luring the user to the malicious redirector via the embedded 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=polyatomic+ions+answer+key
    • http://xefojol.recenterpress.com/uploads/1/3/1/4/131454035/matidewotibul.pdf
    • http://kafoget.freestutteringbooks.com/uploads/1/3/0/7/130738993/3524696.pdf
    • http://jopuneva.boscobakingcompany.com/uploads/1/3/0/8/130874683/19a9636f24cd2.pdf
    • http://doxilil.gartdellearti.com/uploads/1/3/1/8/131856195/35aeea.pdf
    • http://files.olatheeastwomenssoccer.com/uploads/1/3/0/7/130740375/780636.pdf
    • https://cdn.shopify.com/s/files/1/0432/3760/5544/files/can_t_stop_singing_covenant_worship_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/9705/4631/files/pujinosoxam.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5876/files/33326167435.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/4283622395.pdf
    • https://cdn.shopify.com/s/files/1/0448/2508/4065/files/xumasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/skidrow_watch_dogs_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/0912/1184/files/subarachnoid_hemorrhage_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/56371499240.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/suzitawetipewupi.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_off0000d0ee.bin
198bd7750b2bb8bc421baf330941abc7abefafcf9de9c42e00f2787c14b4e80a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EE 5204 bytes
font_01_sfnt_off0000e29b.bin
b1bcf541fa64b13d52f1cd8242f79c5a19e68cce708ff6739b8c39aa1c0e6acb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 10472 bytes

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