Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba4b77decc8dc3ae…

MALICIOUS

PDF

51.7 KB Created: 2020-07-08 19:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4f76a785b0b4e5ea4536495334e343b SHA-1: 460c861a513c489822cdd4873050d295e21a2927 SHA-256: ba4b77decc8dc3ae6fdea1ab763e12ec448780c1afc5cd9168b467f7f84a52eb
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many of which point to domains that appear to be part of a link farm designed to obscure the ultimate destination. One critical heuristic identified a direct link to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains this same redirector URL, suggesting the primary intent is to drive users to malicious infrastructure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wb?keyword=interview%20preparation%20in%20industrial%20instrumentation%20&%20process%20control%20technology%20pdf
    • http://files.kimberlyjherb.com/uploads/1/3/1/4/131407734/6aaa27c09255.pdf
    • http://files.nickpateras.org/uploads/1/3/2/7/132710655/d914f150ae.pdf
    • http://files.barrons-conferences.com/uploads/1/3/1/4/131409170/3066792.pdf
    • http://files.temenosjournal.com/uploads/1/3/1/8/131871762/fosevup.pdf
    • http://files.psychometricdynamics.com/uploads/1/3/1/0/131070116/9284285.pdf
    • http://files.thecovenantschristandyou.com/uploads/1/3/1/3/131379434/94345039.pdf
    • http://files.bampilates.com/uploads/1/3/1/4/131438741/1940dcd9a51.pdf
    • http://files.eriepoloniahistory.com/uploads/1/3/0/8/130873876/7020409.pdf
    • http://files.lawrencelionsbasketball.com/uploads/1/3/0/9/130969907/pafunitanoru.pdf
    • http://files.agathafashion.shop/uploads/1/3/0/9/130969375/9654079.pdf
    • http://files.yolandacstudio.com/uploads/1/3/1/6/131637325/misuxozidup.pdf
    • http://files.reneeisverycool.com/uploads/1/3/1/8/131856041/butumagitexo.pdf
    • https://wuxafojibom.files.wordpress.com/2020/06/rinixotuvuvi.pdf
    • https://dejikirunu.files.wordpress.com/2020/07/lidumajaxo.pdf
    • https://vivaguki.files.wordpress.com/2020/06/52884193382.pdf
    • https://gapigibodaj.files.wordpress.com/2020/07/foxojadupunekug.pdf
    • https://digogaba.files.wordpress.com/2020/06/26359398009.pdf
    • https://duxinum.files.wordpress.com/2020/07/rukomitugitirufufed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85450973079.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zemeletitofugawekabol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejumaxerufu.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/
    • https://cdn.shopify.com/s/files/1/0428/983

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b78.bin
597ce124a4860cd5e205322ebcef1d11e65fe2582ecc7ca18527cc5f777498fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B78 5076 bytes
font_01_sfnt_off00009ca8.bin
60c3c0d4422fb84393c13f7fa3d8b023075b9fcf4cbbfdd0f2b34b46b0b843ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA8 10656 bytes

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