Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b344e5f4fd50494…

MALICIOUS

PDF

45.7 KB Created: 2020-08-02 21:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1b82e0f112325d6b2f2e9aa47ad5d9b SHA-1: a0e68a146929382766ac160791de425e228f9136 SHA-256: 8b344e5f4fd50494bd0b7ae6d07a7cf200f9293b5ff5db0f5b3f2a3cdc2d8a70
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body contains obfuscated text and embedded URLs, including a primary malicious redirector at 'https://ttraff.ru/pify?keyword=boomerang+michael+lewis+pdf'. This indicates the document's purpose is to lure users to malicious sites. No scripts were extracted, limiting the analysis to the PDF structure and embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=boomerang+michael+lewis+pdf
    • http://files.hautebeads.com/uploads/1/3/2/8/132814972/4909615.pdf
    • http://files.goldeneardigital.com/uploads/1/3/1/4/131437276/bipiraferalu.pdf
    • http://files.bitmathedu.com/uploads/1/3/1/0/131071035/wovewo_noropotuji.pdf
    • http://files.brisbaneartclasses.com/uploads/1/3/0/8/130874210/dd9d11863f2e.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3557/files/lagavexexexedajanekosaxut.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/13069459389.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/45359641241.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golizikedakumeru.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3320/files/74058801130.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/54967541306.pdf
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/78670455912.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/volazewadijuvogejin.pdf
    • https://cdn.shopify.com/s/files/1/0431/7141/4173/files/85572570538.pdf
    • https://cdn.shopify.com/s/files/1/0437/0661/3912/files/46610194837.pdf
    • https://cdn.shopify.com/s/files/1/0435/5679/8615/files/93156542000.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_off0000669d.bin
62adc2574b1713b47ae493ef4ca6de584d2327fc4626af7e6135919cfc75f045		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669D 5416 bytes
font_01_sfnt_off000078db.bin
c55b67256ecc269a4e6fba1b25c8d659ab4c66aa0aa1e6476f68a39f1ceb7611		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DB 10288 bytes
font_02_sfnt_off00009bf5.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF5 4324 bytes

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