Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e284b1ffcda46b…

MALICIOUS

PDF

34.9 KB Created: 2020-08-21 22:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b8f5edc5d7608060f4ed1f8a8c46e4d SHA-1: 0a62484236c8e78a19397fda68d89851c2552893 SHA-256: 52e284b1ffcda46bec6db92cd5a96798693db0aceb561dda67d01b0d348a5517
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service (ttraff.ru) known to host malicious content. The document body itself is heavily obfuscated and appears to contain embedded URLs, including the malicious redirector and a link to a PDF hosted on cdn.shopify.com. This indicates a likely attempt to lure users to malicious sites through a link farm, potentially for phishing or malware delivery.

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=adverb+word+search+pdf
    • http://files.vonsmartexercise.com/uploads/1/3/2/7/132740361/d4d93eb8b44af1.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/psc_exam_calendar_october_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/4005/5208/files/blue_planet_project_book_lost_chapters.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/blade_runner_unicorn.pdf
    • https://cdn.shopify.com/s/files/1/0437/2529/1674/files/81757867097.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/88900832206.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/8184574094.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4408/files/43804163303.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/67969906595.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/tent_card_word_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/6427/7657/files/tudodiwofepo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/15362854231.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_off00004b08.bin
970df5cefa791132057b693f6c1db870c1de9bb63a26f47522b1d660c46e9fde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B08 5492 bytes
font_01_sfnt_off00005dba.bin
8387cceb530c87e8089e78116e51cc080a894c99d0f8c42e119373db2e51914c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBA 9752 bytes

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