Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bee074dcc71a77…

MALICIOUS

PDF

66.0 KB Created: 2020-08-02 07:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef80bde35baac0db4f9dcfd74a8d024b SHA-1: c71ed880adc8abeebcd3f8289aa5b47fd80f233d SHA-256: 75bee074dcc71a779245978f56ca2147f3cbd0b48db3c483cd52a7dd891a04a7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text fragments and URLs that suggest a lure to external content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=filter+a+list+python, which is likely used to redirect the user to a malicious site. The ML classifier also strongly indicated maliciousness.

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=filter+a+list+python
    • http://files.vieparlafoi.com/uploads/1/3/0/8/130874148/repenemu_satodorafunuwuw.pdf
    • http://files.dominicksalvatore.com/uploads/1/3/1/6/131607063/34a0c8f266c.pdf
    • http://files.msmarlenesoffice.com/uploads/1/3/1/6/131606146/9054524.pdf
    • http://files.artsforactfineartauction.com/uploads/1/3/1/1/131164313/584f5f8b4b92f.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/masirutum.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/74765338070.pdf
    • https://cdn.shopify.com/s/files/1/0430/6993/1671/files/muzofufojomedekakozalug.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/90307639992.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6930/files/47934054942.pdf
    • https://cdn.shopify.com/s/files/1/0435/8720/7327/files/vawibosuxonukakadubijunir.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4600/files/674797650.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jamitaribigonekadori.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/rovex.pdf
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/14688640110.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/biruporuneraxojeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/monivixedegusafuba.pdf
    • https://cdn.shopify.com/s/files/1/0434/5951/0424/files/muromezuv.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009555.bin
539f5cfa5d18067fe2d2931fb595631b891590a61023489d7aef1eff311a416a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9555 4964 bytes
font_01_sfnt_off0000a631.bin
c9c1075aa37ac8d476268b24e51156a047bddecdbda7b766632e612e80b26d9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA631 3508 bytes
font_02_sfnt_off0000b3fc.bin
13698d7930ec404488517b34bc80cb48d1c19a7d0cf0d001eae67bc4c79134f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3FC 15568 bytes
font_03_sfnt_off0000e4dd.bin
a235935b7da1a3e0dfb4386fa22d70075346861adeac55da3f8f322ddd140fe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DD 16352 bytes

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