Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a0b02b5a107c918…

MALICIOUS

PDF

43.3 KB Created: 2020-08-06 20:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e89f6c4808b4cb112c2d177f71232328 SHA-1: 46d96081d05c8a0e89d2f73638ca15af0c469ea8 SHA-256: 3a0b02b5a107c918b66efb2b1161145975cbb40f858ae7b9e83d74fc377964f9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Acquisitieplan voorbeeld pdf' and the malicious URL, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a link farm, likely for SEO manipulation or to distribute malicious content. 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=acquisitieplan+voorbeeld+pdf
    • http://files.balancemassagebyann.com/uploads/1/3/0/7/130776594/fivofowanuxafiz_tegitexanonudi.pdf
    • http://files.vonarts.org/uploads/1/3/0/7/130738805/nezogijugezevu_ziwegim.pdf
    • http://files.maryclaresartwork.com/uploads/1/3/1/3/131378776/b37c620639d0.pdf
    • http://kojigot.mickkleijwegt.com/uploads/1/3/0/9/130969060/689485.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/55371821.pdf
    • https://cdn.shopify.com/s/files/1/0429/6205/9427/files/14970304281.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/xufetizezoxedafuxas.pdf
    • https://cdn.shopify.com/s/files/1/0432/4586/3067/files/bishop_score_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2122/files/vimupumowisagivem.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3747/files/17401968463.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/84764527157.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulexukiwogefera.pdf
    • https://cdn.shopify.com/s/files/1/0437/3187/8049/files/mapa_antiguo_de_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/suvanu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/levazovafesasupaviwafiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/nojonutagaveninil.pdf
    • https://cdn.shopify.com/s/files/1/0439/8258/6014/files/arecanut_tree_climbing_machine.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b65.bin
2cba86bcf1f21f3b0544966b09bb9e4d96ada59f816065cd6e3c7e93f0846feb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B65 5464 bytes
font_01_sfnt_off00007e12.bin
cafd150f679ad01a1b04e901594e2ac14cfaa5dbb78c5f17db822f8b39ce2751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E12 9876 bytes

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