Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98ea34d8f284f19…

MALICIOUS

PDF

45.7 KB Created: 2020-08-02 15:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1b364435a968670c5314f0d1895d766 SHA-1: 7755a0629cb96151e12fa089e6936af5107c3574 SHA-256: d98ea34d8f284f196f77ba1e82a32fa6478895f67681a007ff5e5922406b8cac
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDF files, forming a link farm. One of these links, https://ttraff.com/pify?keyword=remove+heroku+remote, is identified as a known malicious redirector. This suggests the document is part of a campaign to distribute malicious content or phishing lures through a network of seemingly benign but interconnected documents.

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=remove+heroku+remote
    • http://files.tallyafricanfashionweekend.com/uploads/1/3/2/6/132681749/365467.pdf
    • http://files.fastflyingmarketing.org/uploads/1/3/0/7/130775017/dibedeg-mevog.pdf
    • http://files.precisionrifle.shop/uploads/1/3/1/3/131383319/996c38e08b48f.pdf
    • http://files.gratefuldavecharters.com/uploads/1/3/0/7/130775135/9791504.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/sikewesije.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/rokaz.pdf
    • https://cdn.shopify.com/s/files/1/0436/1574/8253/files/zolemiziganiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/badolulavuzowajekibufobiz.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3586/files/lanekalivefudexe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9472/1187/files/56608878242.pdf
    • https://cdn.shopify.com/s/files/1/0437/2758/5430/files/jipaxuradenovesozig.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2460/files/pepobijinutugovejenu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/pedivosorad.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/vobaxavovobusitugubu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7971/files/19282009970.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/bisifubotabuko.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000602d.bin
a99bb67e8f46b99e644d8b2c4033f28c1b00880f3933236e90c1bfc367d01f4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x602D 4636 bytes
font_01_sfnt_off00006fcf.bin
7db689881405ffebce31f88ae8bb4bd2d2751950500cb4ef64fbad84b962fd04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCF 10856 bytes
font_02_sfnt_off00009517.bin
e2c5521c853205ab1d659ce526742a62a472cd49ec349e1db034337eb40a7a0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9517 16072 bytes

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