Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3178cb4d67bb42d…

MALICIOUS

PDF

40.1 KB Created: 2020-08-22 23:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50b299077618b4b4e4bd94fe556d3aca SHA-1: 8c7274875a81f64c8d9ae0e2416f31daa963b40f SHA-256: f3178cb4d67bb42d25596a6b0b479d68d39177b357ace32a2e7c5d2ab8e8cc92
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.cc/pify?keyword=template+for+a+formal+business+letter'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site disguised as a business letter template.

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.cc/pify?keyword=template+for+a+formal+business+letter
    • http://boxaxugot.vitamedhealthcare.com/uploads/1/3/1/3/131379510/42844313fd1.pdf
    • http://files.bonnieleeanderson.com/uploads/1/3/1/4/131408502/paxitesewafu.pdf
    • http://togefe.robertmcaffee.com/uploads/1/3/0/9/130969265/sududefukiwawo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5770/8185/files/rapijag.pdf
    • https://cdn.shopify.com/s/files/1/0432/2734/9159/files/pneumatic_air_motor_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/tumaxivevotasubopifesenib.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/fowupi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3869/5846/files/larufufapebeno.pdf
    • https://cdn.shopify.com/s/files/1/0429/4030/1478/files/factoring_quadratics_algebra_1_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/4665/8463/files/vezupewesusolatoke.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/metitikatowunaxugezulab.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/wujeguwemosa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/habanera_music_sheet_piano.pdf
    • https://cdn.shopify.com/s/files/1/0437/7716/3416/files/41925574669.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1532/files/sedarutewimo.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_off0000605c.bin
d5bab218f258b2418bd3f56dbd0256229e9f896187ca1aa2d4a0dbaf6e0d043d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605C 5136 bytes
font_01_sfnt_off000071b9.bin
48d033e92defdfabbca74c08ba4ce6433af000934b4463407513c19ebd1db32a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B9 10116 bytes

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