Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d04d593ec881ef…

MALICIOUS

PDF

41.0 KB Created: 2020-08-13 04:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 573d37177ee9d9a80db60eaeee455838 SHA-1: 7fbc58df489148204f6c5b47c4a6e1946a539528 SHA-256: d4d04d593ec881efe1cfe1eb0d23f1dd0365e9eee4103203590b271099672ac1
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=possessive+adjectives+exercises+1o+eso+pdf', which is flagged as malicious. Additionally, a large number of links to external PDFs were found, suggesting a link farm or SEO manipulation tactic, with one such link pointing to 'https://cdn.shopify.com/s/files/1/0429/1955/9335/files/bacillus_anthracis_en_bovinos.pdf'. The primary attack pattern appears to be leveraging these links for redirection or hosting further malicious content.

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=possessive+adjectives+exercises+1o+eso+pdf
    • http://files.davidjensz.com/uploads/1/3/1/4/131408741/gowafet_bejemumefepe_pagixon_tipelifu.pdf
    • http://files.beccacevans.com/uploads/1/3/2/8/132815008/teropukejawuk_bepona_xabizofe_funiro.pdf
    • http://files.allscopaceticfamilyfarm.net/uploads/1/3/0/8/130814529/besener_nerawak_gafogiri_dibop.pdf
    • http://files.iwa-tellmyanmar.com/uploads/1/3/0/7/130739652/natefolenosigapimoz.pdf
    • http://sesujo.doggroomingreadingpa.com/uploads/1/3/1/6/131606419/wavem_fosiputenisut.pdf
    • https://cdn.shopify.com/s/files/1/0429/1955/9335/files/bacillus_anthracis_en_bovinos.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/49684909332.pdf
    • https://cdn.shopify.com/s/files/1/0439/0954/6136/files/30446613703.pdf
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/31559989545.pdf
    • https://cdn.shopify.com/s/files/1/0438/4676/2656/files/14539572101.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/kixen.pdf
    • https://cdn.shopify.com/s/files/1/0430/2327/0042/files/78036177154.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9252/files/pulopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/23862242084.pdf
    • https://cdn.shopify.com/s/files/1/0434/8893/6102/files/vyond_comedy_world_character_creator_github.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/15118979802.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7091/files/inorganic_fertilizers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.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_off000060db.bin
b72bd877c9b5c11e812b0655c6d855cb4aebfe8e3abc3939e96c85a16c4c8e14
pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB 5372 bytes
font_01_sfnt_off00007350.bin
a35253080d2de834b91ca63f8c0f88a89cd0fe7c5dc70fcb676c4147790d74fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7350 10488 bytes