Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93b2df2f178c5e9…

MALICIOUS

PDF

64.1 KB Created: 2020-08-27 19:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3807db3fa04957f776224b5787f6a65 SHA-1: 2f6f73724f2d3965c50ec8914088698808786398 SHA-256: f93b2df2f178c5e9c52fd5247b09b0b057299058d767d0536db2da234bb8ce42
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a game-related keyword. The PDF also exhibits characteristics of a link farm, with numerous links pointing to external resources, many of which are hosted on Shopify. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=castlevania+curse+of+darkness
    • http://xagibap.rautoulab.com/uploads/1/3/1/6/131607063/rasaruzigetima.pdf
    • http://zilezoze.investwithsmdc.com/uploads/1/3/2/8/132814956/zutuzifixi.pdf
    • http://files.deborahsguesthouses.com/uploads/1/3/0/9/130969428/tajudojadofojubuzom.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/examples_of_assets_and_liabilities.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/87630749959.pdf
    • https://cdn.shopify.com/s/files/1/0439/2858/4347/files/43208748739.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9182/files/catalogo_avon_11_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/french_imperative_form_of_partir.pdf
    • https://cdn.shopify.com/s/files/1/0432/0775/3888/files/51920435996.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/83569670186.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/zoxew.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/lozil.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2077/files/65349580322.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/47323565981.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/zizaturuxuralilosirotife.pdf
    • https://cdn.shopify.com/s/files/1/0434/2477/6354/files/visimesis.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/1/0439/2

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000088c7.bin
1b24c69e83d3ef95a10b460d3bf21b58b398294541f96d517c81e0f2061651f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C7 15784 bytes
font_01_sfnt_off0000bbfc.bin
24635801bfa460938c49976efac0286011938cae4dbc71004fab13160708c434		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFC 5044 bytes
font_02_sfnt_off0000cd37.bin
14346176a6db50289b7aaf8b469bb9206fe0a90c28bdd8fcda9c8f0d4f844aa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD37 10492 bytes

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