Malicious PDF — malware analysis report

Static analysis result for SHA-256 027090301e3899d7…

MALICIOUS

PDF

53.6 KB Created: 2020-08-02 20:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 600b03034b80f37b2ad95496ea57437c SHA-1: 61708c4db24a5337bc8473baa3f7972af05fb810 SHA-256: 027090301e3899d73057f61a9775d49bd562cfacc278587f9c9597dbf61bb644
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains references to popular media and URLs that appear to be part of an SEO link farm strategy. This suggests the document is designed to drive traffic to malicious infrastructure under the guise of providing content.

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/pify?keyword=avatar+the+last+airbender+pixa
    • http://files.operationfreedomdogs.com/uploads/1/3/1/4/131437457/jisosajujesapu_zuwozaxixa_xanazewo.pdf
    • http://files.philsguitarhouse.com/uploads/1/3/2/8/132814050/551780.pdf
    • http://files.fmvolleyball.com/uploads/1/3/1/1/131163898/fefurupulumolazal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/78068232759.pdf
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/kipelakupigopigitisi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0049/4241/files/lonuzojipixi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/pinibo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8156/2280/files/bogipuzasafikevatoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7122/files/11627626165.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/butas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/collide_lyrics_kid_rock.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/denedawijamewuvuxeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/31537568985.pdf
    • https://cdn.shopify.com/s/files/1/0438/6937/2576/files/44638413218.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/80455042587.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_off000087cc.bin
9d73b18b2744409ac69a249604414e90ccc30d9d106ba0462d09302c371f4108		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87CC 3572 bytes
font_01_sfnt_off00009474.bin
4f5ae5fb95441d2ccf85dfba15722b9952fe49d7da4fddad2a4179691e32e8e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9474 5304 bytes
font_02_sfnt_off0000a680.bin
1caf5e948ff23cf09e96cacea2bea895c859ec67613be8c3cd12b3fece6aec4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA680 9980 bytes

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