Malicious PDF — malware analysis report

Static analysis result for SHA-256 40544f1eaeb79600…

MALICIOUS

PDF

51.2 KB Created: 2020-08-28 08:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5201d57ab806fa3e2de038a34107d7ec SHA-1: 981aeea2ac62cd858a0fd13a716cbc30f62d797b SHA-256: 40544f1eaeb79600cd159c080268d89683a5565ffc760fcfec1e1f36875c7aa7
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it contains a large number of embedded links, many of which lead to external PDF files hosted on cdn.shopify.com and other domains, indicating a potential link farm or SEO manipulation tactic. The document body contains garbled text and a repeated URL, further supporting the malicious nature.

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=gold+dust+conan+exiles
    • http://files.symphoniejeunesse.org/uploads/1/3/0/7/130739154/9ed6206.pdf
    • http://files.camplajas.org/uploads/1/3/0/8/130814714/pibazudiberaw-latemenojuganaz-kofizolino-tumugediguru.pdf
    • http://files.northridgebands.org/uploads/1/3/2/7/132710575/3938141.pdf
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/easyworship_2018_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/digital_signal_processing_proakis_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/98970090429.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/zolasekowoliligaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/mount_cifs_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0445/8453/4180/files/addressing_mode_of_8085_microprocessor.pdf
    • https://cdn.shopify.com/s/files/1/0431/7600/1700/files/8._2_graphing_more_complicated_rational_functions.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/54183247138.pdf
    • https://cdn.shopify.com/s/files/1/0440/1122/5246/files/zipobibujasarojodewazaru.pdf
    • https://cdn.shopify.com/s/files/1/0438/1101/2770/files/simuminarasewubowefefeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6982/files/pejagusazavog.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/assistive_touch_pro_apk_no_ads.pdf
    • https://cdn.shopify.com/s/files/1/0437/7870/3521/files/29741252129.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_off00007e76.bin
4413035bf84af3b380359600a4766e161f2ed129a59cb2c63770a4d9e1bddce2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E76 4936 bytes
font_01_sfnt_off00008f5a.bin
94bf1ef508f48551ffa15d820dfd831f30b976d5d253b42c980d66b980b62f0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5A 15180 bytes