Malicious PDF — malware analysis report

Static analysis result for SHA-256 959a852966f498c0…

MALICIOUS

PDF

46.1 KB Created: 2020-08-05 08:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8e1418a8f108874c7b4a5e2c520c99f SHA-1: c18eac29c764f547aaedd89226a20683210e0c56 SHA-256: 959a852966f498c0852eeedad3b3666c03b5b84312f66acf8c904028566fbd8b
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 as an educational resource. This redirector likely leads to a malicious payload. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains, suggesting an attempt to manipulate search engine results or distribute content widely. No scripts were extracted from this sample.

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=punctuation+and+capitalization+exercises+with+answers+pdf
    • http://files.trailbaseball.com/uploads/1/3/0/7/130775867/1905920.pdf
    • http://files.talesfromamisfit.com/uploads/1/3/1/8/131856200/feperoxumejif-gemepato.pdf
    • http://files.eponaequestriandesign.com/uploads/1/3/2/6/132696174/gabujitad.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/berabodisiribevafabalo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37278413385.pdf
    • https://cdn.shopify.com/s/files/1/0435/3458/1919/files/27170599810.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/mosaicos_para_colorear_por_numeros.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/lufib.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/mulokugowumesozepana.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/96220146923.pdf
    • https://cdn.shopify.com/s/files/1/0436/9983/0952/files/xevenozubarutu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5929/0022/files/dififavegazukod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/jitebowonomoguxikibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/arabic_words_to_english_translation.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_off000066c7.bin
433829ff04fe0c076a84f79773b7e76791e2a519595fa30ec44ddfb5bf81f4b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C7 5336 bytes
font_01_sfnt_off000078f7.bin
c352536329082d76fae2c38ef06e2f13c56834ffac0d15ad6d4de3ac76b7903d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F7 10476 bytes
font_02_sfnt_off00009c8a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8A 4324 bytes

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