Malicious PDF — malware analysis report

Static analysis result for SHA-256 002954d0a530acad…

MALICIOUS

PDF

49.7 KB Created: 2020-07-14 21:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ed4757ba8990a3032ba285cf39ccc9c SHA-1: 493cae691be16c952998bcbbe5484b579164cb5b SHA-256: 002954d0a530acad5aab4640db9788227ce7ea8f70a3a38c518ad138c9454153
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with many pointing to domains that appear to be part of a link farm. One critical heuristic identified a redirector link to ttraff.com, which is known malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, providing no clear user-facing lure.

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/wb?keyword=hexadecimal%20to%20octal%20conversion%20method%20pdf
    • http://files.goheendesigns.com/uploads/1/3/2/3/132303314/mevonovivusip.pdf
    • http://files.dictionaerie.com/uploads/1/3/1/4/131452867/rofedevemivul.pdf
    • http://files.heartsower.com/uploads/1/3/2/6/132683140/popusimufudoj.pdf
    • http://files.crumblesbynicole.com/uploads/1/3/1/3/131380596/3902028.pdf
    • http://files.lake-kabetogama.com/uploads/1/3/2/6/132682701/e7f9b806011061d.pdf
    • http://files.builders-bargain.com/uploads/1/3/2/7/132710787/dovevarej.pdf
    • http://files.observationsandconclusions.com/uploads/1/3/0/7/130776350/netapixutoveso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://jogapodu.files.wordpress.com/2020/06/48983611547.pdf
    • https://rovetire.files.wordpress.com/2020/07/xadavotugugoji.pdf
    • https://levamine.files.wordpress.com/2020/06/5103838742.pdf
    • https://cdn.shopify.com/s/files/1/0434/5154/7800/files/13307578323.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90685913575.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5589/files/59070797051.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81579197248.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/tujepomisus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/tiwamen.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075c1.bin
9bad6a50638c215429214da1560fcda9211fde2031f15a71fc8abe2542bc75b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C1 5272 bytes
font_01_sfnt_off0000877c.bin
91e758ab33dc93b46e4b3647974f7156a1daee08bce39b3189b3a4c5969b8183		 pdf-font-stream PDF embedded font (sfnt) at offset 0x877C 16136 bytes

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