Malicious PDF — malware analysis report

Static analysis result for SHA-256 190c57c9fb7a32a6…

MALICIOUS

PDF

37.3 KB Created: 2020-08-06 08:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c19887b4c3f3a4c6e1dec09be87bf910 SHA-1: 52955fb1fb6e76c37c6834eb254959799cf746de SHA-256: 190c57c9fb7a32a659a87ab2d80e5500751a650c14e77c7706cb4dd7ae9fa4d6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for linking to known malicious redirector infrastructure. The document body and embedded URLs indicate a link farm strategy, aiming to direct users to various PDF files, with the primary redirector being ttraff.com. This suggests an attempt to distribute malicious content or lead users to phishing sites.

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=bescherelle+conjugaison+pour+tous+pdf+download
    • http://files.makerteacher.net/uploads/1/3/1/4/131409761/nifokativubozuv-vugojubudunofes-sijuziledizu.pdf
    • http://files.beaconbeerco.com/uploads/1/3/1/6/131606393/a9ebc51937.pdf
    • http://kitikume.dannguyenportfolio.com/uploads/1/3/1/4/131408100/gorafatirisiwaxelu.pdf
    • http://zunuj.gokiting.com.au/uploads/1/3/1/0/131069934/8246408.pdf
    • http://files.ksdgroup.com/uploads/1/3/1/4/131438211/jimem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1236/6241/files/moxebedisofok.pdf
    • https://cdn.shopify.com/s/files/1/0430/5161/4359/files/16425977272.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/80712356706.pdf
    • https://cdn.shopify.com/s/files/1/0434/0963/7530/files/67394340578.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/virul.pdf
    • https://cdn.shopify.com/s/files/1/0429/5517/8150/files/13210863745.pdf
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/69086072303.pdf
    • https://cdn.shopify.com/s/files/1/0435/7872/0414/files/zuxamegubekox.pdf
    • https://cdn.shopify.com/s/files/1/0436/4517/3910/files/luxusituper.pdf
    • https://cdn.shopify.com/s/files/1/0439/1059/4728/files/firework_animation_gif.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/kalajogelezu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5268/files/97062454163.pdf
    • https://cdn.shopify.com/s/files/1/0430/7009/5521/files/xuzefu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5805/9671/files/mp4_bollywood_movies.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_off00004ef1.bin
1fb4159dc4d7b45a1ea8dad6681661b94a07817cca54f1f84f7cb4d7f338e6b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF1 5636 bytes
font_01_sfnt_off00006236.bin
30f9294ffe0cbcb78a2cdff534984340c7dd152eb8144464b097a898eb96c709		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6236 11252 bytes

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