Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6af14ab5d9736fb…

MALICIOUS

PDF

53.1 KB Created: 2020-08-18 14:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0151c61e2dcc4e3261913e18acce618e SHA-1: 42c28bb30348ac064e7680d404f63132bed503dc SHA-256: e6af14ab5d9736fb248551671309d6debac72ecf2cd9715c82282489641499aa
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=andrew+ng+deep+learning+course'. This URL is presented within the document body, disguised as a link to a deep learning course. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The ML classifier strongly indicates maliciousness.

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.com/pify?keyword=andrew+ng+deep+learning+course
    • http://gunuru.bhavsingh.com/uploads/1/3/1/6/131637896/tanoxovozo.pdf
    • http://mujuso.tennisschule-khablo.com/uploads/1/3/2/8/132814930/wiwiwoji_wiretojal_vafova.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/86513489614.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/votenagopaxuvakofifemow.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/rodofuwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/sajotaxefuxosizabuzoxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/67874951168.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/9490835445.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/valuvu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/62455703142.pdf
    • https://cdn.shopify.com/s/files/1/0431/7226/6138/files/puzojagoluriratuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/mekawulo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4383/files/xinat.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3969/files/ritabozoka.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009096.bin
e0118550f090faa265dc697ed30f95f09e6478f53a25009f7344588358c1e121		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9096 5320 bytes
font_01_sfnt_off0000a2c4.bin
e6906a7c94024e476e2107e84bde71c251c49dcdd2ebcae5f0e5866a0f40683a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C4 10664 bytes

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