Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0486f448bcf024…

MALICIOUS

PDF

35.6 KB Created: 2020-08-11 23:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86e41133c2d72c7d638aef42808c17b4 SHA-1: 4a8409e925e7342afb803a6cf68145364060df58 SHA-256: ad0486f448bcf0249da1aa9581f8129e5b5dadd76d073a42045bbd11d30cb3ac
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many of which are benign Shopify URLs, but the presence of the malicious redirector is the highest priority IOC. No scripts were extracted from this sample.

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/wb?keyword=converter%20ficheiros%20zip%20em%20pdf
    • http://files.newcovenantinspections.com/uploads/1/3/1/3/131380063/9244010.pdf
    • http://files.87dynamics.com/uploads/1/3/2/6/132683357/4066717.pdf
    • http://kutolik.projectovercomeinc.org/uploads/1/3/0/8/130874493/565269.pdf
    • http://files.romancatholicchurchmelfort.com/uploads/1/3/1/4/131407152/0f8c991d1821c.pdf
    • http://guximopi.thetippinteacup.com/uploads/1/3/1/8/131872269/wijen.pdf
    • https://cdn.shopify.com/s/files/1/0431/3337/0522/files/periodo_arcaico_en_america.pdf
    • https://cdn.shopify.com/s/files/1/0435/3707/2280/files/brain_training_for_dogs_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/kayla_itsines_bikini_body_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/vuzadutabukakerit.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/bomot.pdf
    • https://cdn.shopify.com/s/files/1/0435/9671/0050/files/45258702853.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/us_military_phonetic_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0428/2158/3004/files/66474466626.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6880/8613/files/xajijekebidepokose.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_off00004f33.bin
8a3e9a06671ca97cafcd2b0678c281f354cfc1803c3edad45f0ee5e021fefb34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F33 5168 bytes
font_01_sfnt_off000060ac.bin
876b602bc5d7778812008c47f1f54690b3d958d2b98281936dfb2e8428f10deb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AC 9696 bytes

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