Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea41202b55a38b8…

MALICIOUS

PDF

33.0 KB Created: 2020-08-16 16:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b2dc4cab87a5d8a093297b15b69f5ac SHA-1: 015ff26d32cfde750fda6f9faa32986b4a168d7e SHA-256: 4ea41202b55a38b81ac9b6aaf93b7d5edfd221284159d9da760ad1cc119cfb86
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=kaththi+bgm+ringtones'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF filenames, suggesting a lure to external content. 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=kaththi+bgm+ringtones
    • http://files.annakramerwriter.com/uploads/1/3/1/4/131410685/8804239.pdf
    • http://files.daddybabygirl.com/uploads/1/3/0/7/130738639/vawur.pdf
    • http://zajiwovo.loewkebrill.com/uploads/1/3/0/7/130739593/juzamopemus.pdf
    • http://paduraz.saritzahernandez.com/uploads/1/3/0/8/130874123/gotuxufaripuxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/renudajudotoguzerunopame.pdf
    • https://cdn.shopify.com/s/files/1/0435/5653/6479/files/7881477390.pdf
    • https://cdn.shopify.com/s/files/1/0430/1219/4463/files/8400692025.pdf
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/pimot.pdf
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/68057593173.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83260340608.pdf
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/french_arabic_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0434/4263/4917/files/35061104839.pdf
    • https://cdn.shopify.com/s/files/1/0431/4788/6743/files/12775338645.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/fodobepemafe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8416/9894/files/2_4_4_engineering_lettering_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0439/9595/5358/files/xolinisi.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_off000044c7.bin
f75e378b2d8e334373bdd844b6290f5f6ffd0f43545621da0a3be14ea3929bc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44C7 5176 bytes
font_01_sfnt_off0000563d.bin
f373c904887c11c7a8a68361469c9cdbbf213d0d8262a7b5881e985748917de2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x563D 9616 bytes

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