Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f63618ce95431ae…

MALICIOUS

PDF

50.1 KB Created: 2020-07-26 20:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3788e1a92805e41ce77fbb5fd2e5c1a SHA-1: a0ce8545f3c3bd9c5dda16ca1f06006aa7ac2f04 SHA-256: 9f63618ce95431ae29f713cc1a95caee4254b9ae37ce077dc8e5f60207f735b3
152 Risk Score

Malware Insights

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

The PDF file exhibits malicious characteristics, primarily through its extensive use of embedded links. It includes a link to a known malicious redirector at 'ttraff.com', suggesting a phishing or malware distribution attempt. Additionally, it features a large number of links to external PDFs hosted on Shopify, which is indicative of a link farm, potentially for SEO manipulation or to obscure the true malicious intent. The ML classifier strongly flagged this PDF as malicious.

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=business+brochure+templates+blue
    • http://files.nlfarchitect.com/uploads/1/3/0/9/130969411/tekadu_guladegowiwido.pdf
    • http://files.metalmeltdown.com/uploads/1/3/0/7/130775755/36f932b68a.pdf
    • http://files.dancecompanyocala.com/uploads/1/3/1/8/131871569/subuzes.pdf
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/fapojubomisosoru.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/41471981671.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/vekifexebu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/winutazuxajim.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6117/files/xaliledo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/90107599775.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zixetirubopejama.pdf
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/bonirififijinixivov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0431/7010/3452/files/bufelazovi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/49043413526.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/fofazisuwim.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/12936331085.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/webajiponiwaponise.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_off00008711.bin
99fa7c2701fa79388d69e9f08b13cb04b0a8e15250c642f8fb2539ceca7622f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8711 5244 bytes
font_01_sfnt_off000098a4.bin
e89f9b98113e8adc4748b2acafa320a776437fc2d17e3d3c71b432e4f343a9a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98A4 10108 bytes

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