Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1369f59f734917…

MALICIOUS

PDF

44.2 KB Created: 2020-08-23 22:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f4aa347102047da67c87f627be84a86 SHA-1: a1d85de595781aa3b8b69a3e6147fbd62f44e8f6 SHA-256: 3a1369f59f734917fc01f957db2418b097f7fdc98998d1ba0496656947c45fc6
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'geometry basics worksheet answers'. The presence of a link farm with 24 external PDF links, many hosted on Shopify, indicates a broad attempt to distribute malicious content. The primary malicious URL identified is https://ttraff.cc/pify?keyword=geometry+basics+worksheet+answers, which is flagged as a malicious redirector.

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=geometry+basics+worksheet+answers
    • http://files.employmentcollaborative.com/uploads/1/3/2/3/132302870/mupasinajeruv.pdf
    • https://cdn.shopify.com/s/files/1/0443/6351/4012/files/bazowiwekanalavefevulev.pdf
    • https://cdn.shopify.com/s/files/1/0432/0880/2466/files/translate_english_to_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/nifisako.pdf
    • https://cdn.shopify.com/s/files/1/0432/9259/0236/files/bupijixagilikumanajaxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/0512/3493/files/asturias_mapa_turistico.pdf
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/setumiligetuwopazawog.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9637/files/78440565407.pdf
    • https://cdn.shopify.com/s/files/1/0448/8983/3639/files/wixefemut.pdf
    • https://cdn.shopify.com/s/files/1/0429/5150/8131/files/ladukasixaruveze.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4022/files/bizitudufozon.pdf
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/93390306648.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006140.bin
a09b021955da3aa84717dc2e4d62bf4a41a75fd2fc2b53879448662fd069e21c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6140 5224 bytes
font_01_sfnt_off000072f1.bin
92b7c441e74535babbf2e146a368eaa0a85887a156c04bf723ebfbe13a393810		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F1 10276 bytes
font_02_sfnt_off00009624.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9624 4324 bytes

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