Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeae0a706fb3e76b…

MALICIOUS

PDF

49.0 KB Created: 2020-08-15 12:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2219831c5006004466f5cc1a9c15899a SHA-1: 2d647fcecf0d84f1cc383d45ec3a11567a90abd5 SHA-256: aeae0a706fb3e76b50e6095180ee39aa8ad362b026c31fcdfd289117e26e9179
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=numericals%20on%20series%20and%20parallel%20circuits%20class%2010%20pdf'. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a link farm or SEO poisoning tactic to lure victims. 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.ru/wb?keyword=numericals%20on%20series%20and%20parallel%20circuits%20class%2010%20pdf
    • http://zaxibane.davenportsequipment.com/uploads/1/3/0/7/130739059/6349264.pdf
    • http://jifoku.philmancusi.com/uploads/1/3/1/6/131636725/ea0b48.pdf
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/19549849167.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/68519164420.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/balazetovowomalimuwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/abnormal_psychology_an_integrative_approach_8th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/58841452434.pdf
    • https://cdn.shopify.com/s/files/1/0437/1454/3771/files/zetagotuxosipimepuvilon.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/rifenemusuluruvekuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/74657097786.pdf
    • https://cdn.shopify.com/s/files/1/0429/1965/7628/files/50534015006.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/oriflame_catalogue_september_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/enlace_quimico_1o_bachillerato.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.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_off00006bcc.bin
8973a0e1bfb3705ba2e20e7b30f092ae2cf527aee737c1172f3ce17856d9f931		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCC 5464 bytes
font_01_sfnt_off00007e44.bin
69cce6a9bae12b22acbd80ea202650892d2ced717e9af8d7d469c4554747b29c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E44 10076 bytes
font_02_sfnt_off0000a0f8.bin
f51dae07a8f97b110891a9471e4747f311812d9e9d041a2fc4d8538fa15232b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F8 16240 bytes

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