Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4a463aa7ebc7dc…

MALICIOUS

PDF

45.0 KB Created: 2020-08-21 05:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8436c5e262924347834b8a53642e08f3 SHA-1: a7accb4f3800667bf7be0e4a4c74bc7bfa44bb47 SHA-256: 4b4a463aa7ebc7dc0e9bd299035143019fc7245e106674c268de22cd0869848b
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, a common tactic for SEO manipulation or distributing malicious content. One of these links, 'https://ttraff.cc/pify?keyword=carotid+sheath+formed+by', is known to redirect to malicious infrastructure. The document body is heavily obfuscated and appears to be generated content rather than user-readable text, further supporting a non-legitimate purpose.

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=carotid+sheath+formed+by
    • http://files.capitalarealiteracy.org/uploads/1/3/1/0/131069781/833ab23d8.pdf
    • http://files.troutbum.ca/uploads/1/3/2/7/132710655/046c6686a.pdf
    • http://wexejemu.nutriandmore.com/uploads/1/3/2/6/132682076/7170594.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/role_of_auxin_in_plants.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5494/files/tupava.pdf
    • https://cdn.shopify.com/s/files/1/0433/6454/8762/files/advanced_language_practise_vince.pdf
    • https://cdn.shopify.com/s/files/1/0432/7391/2488/files/video_editing_software_for_android_phones.pdf
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/32908037070.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/kugojoda.pdf
    • https://cdn.shopify.com/s/files/1/0434/3237/8517/files/39687546990.pdf
    • https://cdn.shopify.com/s/files/1/0435/8848/5288/files/keylogger_for_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0439/8202/8958/files/ziruxafufufunoxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/xojexikobukaxa.pdf
    • https://cdn.shopify.com/s/files/1/0447/8546/7558/files/nesilojugilixapekomo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4031/7335/files/team_building_activities_for_students.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_off00007217.bin
0106c221ce54b5b0c30f380205875fdc4b1396520bb497273093444c77270896		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7217 5264 bytes
font_01_sfnt_off000083d8.bin
98d29dc89b440ab729d74cd4029fd7698683ba83c1693e9c1a25c745466a1d2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D8 10352 bytes

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