Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebd3869719f7e6c…

MALICIOUS

PDF

54.5 KB Created: 2020-08-02 18:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81d093ce11fa10e14fc89151151119d5 SHA-1: 3f8429883a1115e50fff4f05cf982dde57069bda SHA-256: 6ebd3869719f7e6c9aeabf706f9620708e94e99f69a4063dd1a0690c84e64e88
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.ru/pify?keyword=the+next+millionaire+next+door+pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting it's the primary lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=the+next+millionaire+next+door+pdf
    • http://files.universitytools.org/uploads/1/3/0/7/130740183/miruzogil.pdf
    • http://files.rusticrevivalco.com/uploads/1/3/0/8/130874010/jebozidewomovejejusa.pdf
    • http://files.vmplf.com/uploads/1/3/1/6/131606818/aef02d7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2335/8358/files/jimukipolidofakole.pdf
    • https://cdn.shopify.com/s/files/1/0429/4138/2812/files/defudabatojavori.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/lipesaros.pdf
    • https://cdn.shopify.com/s/files/1/0437/7657/3601/files/34627043707.pdf
    • https://cdn.shopify.com/s/files/1/0431/1980/4578/files/waxewevuxukadog.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2103/files/42225972338.pdf
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/70514892934.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/57249504419.pdf
    • https://cdn.shopify.com/s/files/1/0439/9503/7854/files/7024128532.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/vestirse_conjugation_preterite.pdf
    • https://cdn.shopify.com/s/files/1/0437/5589/6983/files/fobetamapijikunanoka.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000979c.bin
2a0b79d803e077c319ae3e5799300413fd21e9b0701ffec7066264577d9a2e6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x979C 5120 bytes
font_01_sfnt_off0000a8df.bin
9f5045209012c4b4f4a354d0983c071d259910114c8638e1909f2e65a7cf2e15
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8DF 10536 bytes