Malicious PDF — malware analysis report

Static analysis result for SHA-256 3209d8e2f5705e87…

MALICIOUS

PDF

38.2 KB Created: 2020-08-07 12:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 523d0591a24d499b4c4a6520ee80e2eb SHA-1: 6c8c7d6b2a51423bbb3a03c8e12466d1205b9083 SHA-256: 3209d8e2f5705e87e56e461086982ef324ab5eb079f9d9cb2999cbc2fd368777
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=angiomas+cavernosos+cerebrales+pdf'. The document body, though heavily obfuscated, also contains this URL and other embedded URLs pointing to Shopify and various file-hosting domains, suggesting a coordinated effort to distribute malicious 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.cc/pify?keyword=angiomas+cavernosos+cerebrales+pdf
    • http://files.greencityappliancerepair.com/uploads/1/3/1/3/131381518/8365566.pdf
    • http://files.jasonmarshallconsulting.com/uploads/1/3/0/7/130776255/1660888.pdf
    • http://files.glaciercitygardener.com/uploads/1/3/1/0/131070362/nabutox.pdf
    • http://files.australianwandarrah.com/uploads/1/3/1/4/131438059/xirubodobo.pdf
    • http://sukulamu.kpugaming.com/uploads/1/3/0/8/130874304/wawamaser.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0759/files/21169574904.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/vapubomusigijawazuta.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/zedemenabelefumesoledasuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/24884187843.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/classroom_mathematics_grade_12_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/8447/1710/files/74136355269.pdf
    • https://cdn.shopify.com/s/files/1/0428/5736/5670/files/id_checking_guide_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/xurekusudupedimuxutaseki.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/20412525706.pdf
    • https://cdn.shopify.com/s/files/1/0436/5815/0046/files/wuwobakuvowazabutokixeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/campanella_ukulele.pdf
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/online_advertising_project.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_off0000538b.bin
7367d3fc31450b57dd66d6249ff453ae16e9699f57a19c538876dd6bbee75f2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x538B 5664 bytes
font_01_sfnt_off000066c5.bin
d68f90757ab7e1e5a390003cbc646bf94d0a2b3efde3edc215da3bca1c091e09
pdf-font-stream PDF embedded font (sfnt) at offset 0x66C5 10876 bytes