Malicious PDF — malware analysis report

Static analysis result for SHA-256 9150558e98d77701…

MALICIOUS

PDF

43.8 KB Created: 2020-08-10 00:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87adc97f2b517d19cb00d957c5b91cfd SHA-1: a12b5fd7d394538110aa42820dd9d3ab07e8ef94 SHA-256: 9150558e98d77701c6b3109f7dac5b70ab83265ba55c3fdc89abab0a899748c9
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. It also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign Shopify domains but are likely used to obscure the malicious destination. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for a 'quarterly calendar pdf 2020'. The presence of a 'download button' heuristic further supports a malicious workflow.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=quarterly+calendar+pdf+2020
    • http://files.huttvalleysportsawards.co.nz/uploads/1/3/0/7/130739918/nimenomuner.pdf
    • http://files.fotosations.com/uploads/1/3/0/8/130814124/nunegurubek-lelexuromesed.pdf
    • http://files.amyhandelsman.com/uploads/1/3/0/7/130740213/736043.pdf
    • http://tutoneza.westwindsfarmcolorado.com/uploads/1/3/0/7/130775448/vusukexire.pdf
    • http://files.bgooddesignllc.com/uploads/1/3/1/0/131070792/4005ea31aaa057.pdf
    • https://cdn.shopify.com/s/files/1/0438/8143/1195/files/8680339754.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/85180271488.pdf
    • https://cdn.shopify.com/s/files/1/0429/6487/7471/files/80698954526.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/vozelelumixijituxajolego.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/jusefatezebej.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3282/files/amplification_of_dna_by_pcr.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/bapid.pdf
    • https://cdn.shopify.com/s/files/1/0432/7276/5598/files/68707905085.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/13984157584.pdf
    • https://cdn.shopify.com/s/files/1/0438/6340/8795/files/dexolugiwolez.pdf
    • https://cdn.shopify.com/s/files/1/0433/5091/7269/files/clinical_pharmacy_practice_parthasarathy.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/babawakoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5169/5771/files/82552560379.pdf
    • https://cdn.shopify.com/s/files/1/0433/0248/6180/files/sosujukojazelipon.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2325/files/10x20_gambrel_shed_plans.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_off00006b1c.bin
ad986e7f936508e4936f3b33535d78621faa6b36691a8ae8ed3ad017b1382b95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1C 5408 bytes
font_01_sfnt_off00007d9a.bin
0fae462a52dd569f58dab5a504d63cc263c831de33b6d63139b83166257756b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9A 10892 bytes

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