Malicious PDF — malware analysis report

Static analysis result for SHA-256 38afd0fa67391fbb…

MALICIOUS

PDF

62.0 KB Created: 2020-08-08 02:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70b64467e5d3cb4acb0e0340a4fbc30e SHA-1: f26bcb3c09d690c0b2595836c51f56bd7a143ed1 SHA-256: 38afd0fa67391fbbb5c94270b94a545958b6572bf91478e798eeabd5116e0e82
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, 'ttraff.ru', which is further supported by the presence of a link farm heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise malicious intent with seemingly relevant keywords. 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.ru/pify?keyword=bacteria+clostridium+botulinum+pdf
    • http://files.creatify.media/uploads/1/3/1/3/131398143/88134ecc5f.pdf
    • http://files.jamieashleydesigns.com/uploads/1/3/1/6/131606390/a1ffcaf4f20ec.pdf
    • http://files.cameronhighlandshomestay.com/uploads/1/3/1/3/131380741/7867893.pdf
    • http://wukanam.itransformyou.com/uploads/1/3/0/8/130874359/jewidedukur.pdf
    • http://salove.blessingoftheemeraldcoast.com/uploads/1/3/0/9/130969060/8ba181483f6.pdf
    • https://cdn.shopify.com/s/files/1/0440/4396/0485/files/relew.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/dynamics_of_machinery_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8272/files/25459296908.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/wovelefezewapidetup.pdf
    • https://cdn.shopify.com/s/files/1/0437/1726/3510/files/characteristics_of_management_accounting_information.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/kodudunazudun.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/numinetaniteremigufogi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/dead_by_daylight_maps.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7554/files/amelie_nothomb_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/47732173093.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_off0000b0ba.bin
d9e882d28f82118669efe99cdcf42031be2aad3b8e51cdc71cf419ef305c7ad6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0BA 5492 bytes
font_01_sfnt_off0000c349.bin
7f291202f5a0a949feddfa128b40c8d7811fc004007b08390dcbf0b36bd68022		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC349 12152 bytes

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