Malicious PDF — malware analysis report

Static analysis result for SHA-256 791d49f7aa6a6253…

MALICIOUS

PDF

33.6 KB Created: 2020-08-11 16:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b0c4d346b933c08a6c59bf11c6d2fb0 SHA-1: 9d1988fea62f8f12f57ac04f3b86b09d51d91940 SHA-256: 791d49f7aa6a625306eeab5f74637aae0db8bd41e06fd50bb260aa7739905e3f
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body itself is heavily obfuscated but contains references to the malicious URL and other benign-looking Shopify links, likely as part of a link farm to improve search engine ranking and disguise malicious activity. The primary malicious URL is https://ttraff.com/pify?keyword=warsaw+pact+ground+forces+osprey+pdf, which is designed to redirect the user to 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.com/pify?keyword=warsaw+pact+ground+forces+osprey+pdf
    • http://soporasaw.meacorsigns.com/uploads/1/3/2/8/132814930/1f40d90b.pdf
    • http://lobotu.equityfinancetaxservice.com/uploads/1/3/1/8/131856726/c2340b59f908a.pdf
    • http://files.sheilasplace.com/uploads/1/3/1/6/131606475/nunoro_negapofedi_dafivelu.pdf
    • http://files.if-airfranceklmva.com/uploads/1/3/1/4/131406885/6e59c39ab7a4.pdf
    • http://files.youngerman-art.com/uploads/1/3/1/3/131380158/tularenekug.pdf
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/character_traits_in_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/pasufibijaxipifoger.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/vehicle_system_dynamics.pdf
    • https://cdn.shopify.com/s/files/1/0441/1041/3976/files/cognitive_appraisal_theory_of_emotion.pdf
    • https://cdn.shopify.com/s/files/1/0437/5016/2583/files/lujexidowonuduzidugozew.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/mefopunizidozojokovugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/harvey_accumulation_by_dispossession.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9009/files/jodokojinizatobugaku.pdf
    • https://cdn.shopify.com/s/files/1/0433/8774/8519/files/ameline_eric_sammut.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1410/files/13620936251.pdf
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/john_lennon_beautiful_boy_lyric.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/36631741215.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_off00004641.bin
85c0e3f9e5bd875377121ebf3a9d7e38ab42e8a78a749fb289baed51ab9ba9df
pdf-font-stream PDF embedded font (sfnt) at offset 0x4641 5500 bytes
font_01_sfnt_off0000591f.bin
5096e9ccdce38996e5781899eaf05f352c6d0d924491c960fb316fed7e258c81
pdf-font-stream PDF embedded font (sfnt) at offset 0x591F 9412 bytes