Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdea996c4314a34a…

MALICIOUS

PDF

40.4 KB Created: 2020-08-10 14:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cff0c931c17677b54b19a0c67bf6eb2 SHA-1: cceede796c050031a0fe84c3e9bed3e654ebe156 SHA-256: bdea996c4314a34a3c3cdb39ad9899411103c29975c835110c0d21f2b2e9bc5f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting the document's purpose is to lure users to this external site.

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=que+son+los+acuerdos+comerciales+internacionales+pdf
    • http://files.elenafoukes.com/uploads/1/3/1/8/131871462/5286242.pdf
    • http://munisuta.bartek.systems/uploads/1/3/1/4/131454065/lafuvukigis.pdf
    • http://files.deucesdogcleanupllc.com/uploads/1/3/0/7/130740231/bddd29b1f3b8.pdf
    • http://files.hudsonlock.com/uploads/1/3/1/6/131608016/jadilan-sitovana.pdf
    • https://cdn.shopify.com/s/files/1/0431/1210/4103/files/pedujefijigazase.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/90880581406.pdf
    • https://cdn.shopify.com/s/files/1/0431/0918/7750/files/84448183005.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9097/files/57303566626.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/84579220247.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/fourth_grade_spelling_words.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/95648706482.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/jedujiwerelakodegupexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/mevukerobak.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/jurnal_biogas_dari_kotoran_sapi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4852/6246/files/jijuxobowex.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8686/files/64040755826.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/59552787144.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_off00005d94.bin
4d843366803353dc4553e657a16a12eace36ad0d1901b2c0ca0a0c32d45e4e6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D94 5360 bytes
font_01_sfnt_off00006fb8.bin
a3898b6521d972f3e7c8d484e14c2363ae337a684ba78c475ba1f09a7bb14d2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB8 10644 bytes

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