Malicious PDF — malware analysis report

Static analysis result for SHA-256 27febfea873bc1ac…

MALICIOUS

PDF

33.9 KB Created: 2020-08-03 23:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9050f53dc117554d7407ce8919d464ea SHA-1: fddc092f2342116005edfa188a3b489db3e195a8 SHA-256: 27febfea873bc1acccecc40d83db63057d15b969208816e0bb282e0fa2e116b6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links redirects to `https://ttraff.ru/pify?keyword=vertical+and+horizontal+lines+worksheet+pdf`, which is known malicious redirector infrastructure. This suggests the document is designed to lead users to malicious sites through a series of redirects.

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=vertical+and+horizontal+lines+worksheet+pdf
    • http://files.noahsthompson.com/uploads/1/3/1/8/131856065/redesokuwabajo_wedisav_siwuxiv_refofibije.pdf
    • http://files.ml-journeys.com/uploads/1/3/1/3/131382841/gavogetenono.pdf
    • http://files.originalgravitytours.com/uploads/1/3/2/6/132695372/pigejoxerabebu_tabipimojifiri_zaxidefupaj.pdf
    • http://files.fbcwaycrossyouth.com/uploads/1/3/2/6/132680986/5778909.pdf
    • http://files.saltspringtoyrun.com/uploads/1/3/1/3/131382274/3872108.pdf
    • https://cdn.shopify.com/s/files/1/0434/4260/2140/files/tifitukimivajefu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0104/files/6891084454.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/79697536156.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/77204103135.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/jazituzomeged.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/arduino_mega_2560_pin_mapping_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/4275/9071/files/ham_radio_license_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6519/files/ninuku.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/99720530059.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3042/files/64560404140.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_off000047d0.bin
7611f9482fedda5ccc6ea85a41b2b0c8b8af2177efca22f7a9259df71a93ee10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47D0 5416 bytes
font_01_sfnt_off00005a50.bin
e1c9bf74b9c3c274555f3b63bcae42891d2102b3f7c9c9f31d558d1db1732aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A50 9568 bytes

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