Malicious PDF — malware analysis report

Static analysis result for SHA-256 108bbf29d031ef53…

MALICIOUS

PDF

56.4 KB Created: 2020-08-02 13:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e2b1e68194e712949719902b9022e7e SHA-1: fa9fdb39c7ea879fa449c6130952dd23c55fde0b SHA-256: 108bbf29d031ef53c77e8f4345ccd0dae0ce3b09228cf7b3112e7627e52704d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The document body text and embedded links suggest a lure, possibly related to SEO spam or phishing, aiming to direct users to malicious 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.cc/pify?keyword=tatta+hitotsu+no+koi
    • http://files.victoriachampionart.com/uploads/1/3/0/9/130969485/pawixi.pdf
    • http://files.memberships.jacwellness.com/uploads/1/3/0/7/130776104/1430325.pdf
    • http://files.lesliesearsart.com/uploads/1/3/2/6/132681969/fejufiveg.pdf
    • http://files.housewifeofhorror.com/uploads/1/3/0/7/130775011/dulexuforewiso.pdf
    • http://files.batrssocal.com/uploads/1/3/1/3/131384789/vipibifoxoteroxu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1514/2567/files/lijonalepojixatu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/rotozivuma.pdf
    • https://cdn.shopify.com/s/files/1/0429/9046/9283/files/rozevupatav.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/repoparegaxuwejenaburo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0260/files/39708931651.pdf
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/reference_images_for_3d_modeling.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/manufimag.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/lego_batman_2_cheat_codes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/87172868355.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/72651867227.pdf
    • https://cdn.shopify.com/s/files/1/0431/1669/1612/files/jayco_owners_forum.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/gitinewuvatewozelawixarit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e8b.bin
767becc9e88d8e19b32521fcd9d0e05fb3ce0a6c702cb9097280ddadb9f5a9d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8B 10564 bytes
font_01_sfnt_off0000a147.bin
66ceefcd0c71eb62d5754c1ded72ce02ae7f038ffb860e447e1acf5aefe69a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA147 4660 bytes
font_02_sfnt_off0000b11b.bin
3ae14dddb1d6bd8033d04c984cc55d2d5f09d67db551423ada87bb47bda7fe74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB11B 10356 bytes

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