Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ccbdb16a37fae5…

MALICIOUS

PDF

56.2 KB Created: 2020-08-09 21:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbf2e2b60c249d3aa72f7a57ae30d929 SHA-1: 383dca3a1833427e93e9c902c4edb9e30fa968ab SHA-256: 14ccbdb16a37fae5345217434a5eab3fe5f83b75402fdd63b549e23123b38faf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation or malware distribution. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.com', which is used to obscure the final destination. The document body, though heavily corrupted, contains a reference to the 'ttraff.com' URL, reinforcing its role in directing users to download content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=bsc+3rd+year+maths+books+pdf+download
    • http://jarutuwuf.truvisioncolombia.com/uploads/1/3/1/4/131482975/zinazaw.pdf
    • http://files.iraqikurdistantours.com/uploads/1/3/1/4/131483719/668d65df.pdf
    • http://files.gloucestershiregatewaytrust.org.uk/uploads/1/3/1/0/131070207/temalabal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/fatalazugegomizaxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9513/files/panasowodowuwa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5976/3617/files/pugejorisilodujifipezomib.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/lexical_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/wasemefonukefejaxuwuvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/jituweboripepolif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/toromekukofazivesobutoso.pdf
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/pefimufesatasasogivadovab.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2377/files/69029913371.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/rijojegizovipevezi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/63419095500.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0734/files/bandelier_national_monument_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/exxaro_bursary_application_forms_2020.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d6f.bin
b11fd5fc3c8a9ed5842c0c130cf29aea5dc94a3fba66ceffb90d926026b2d048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6F 6004 bytes
font_01_sfnt_off000091c6.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91C6 1800 bytes
font_02_sfnt_off00009a54.bin
b3c028908b311974cee98cce559a5abfe73129ee3f3cd5e5eb325b1a417b27c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A54 10440 bytes
font_03_sfnt_off0000be3d.bin
5338b60dac2ddcc9fbf81734882903060897ff8c18563aad6864a581beec55c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE3D 16068 bytes

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