Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ff992a25c4993d…

MALICIOUS

PDF

48.6 KB Created: 2020-08-02 02:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cb5389166100e1ca0e5ac8cb3188616 SHA-1: d168494b3cfc79380fe0fb075c951a32e14fd989 SHA-256: 58ff992a25c4993d69b0bba279f06210d930731a5b61397714b2e77ff9536abf
152 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, a common technique for distributing malicious content. Specifically, it links to a known malicious redirector at 'ttraff.ru' which is designed to funnel users to further malicious sites. The document's primary function appears to be acting as a link farm, leveraging SEO tactics to distribute these malicious links.

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=slave+maker+game
    • http://files.anedu.com.au/uploads/1/3/0/8/130814058/xetomoze_setifojigoxiteg.pdf
    • http://files.gwensnewandused.org/uploads/1/3/1/0/131071056/6903685.pdf
    • http://files.margeritapule.org/uploads/1/3/1/0/131070792/nurazegemonefu.pdf
    • http://files.gwensnewandused.org/uploads/1/3
    • https://cdn.shopify.com/s/files/1/0432/1017/8717/files/64087661544.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bibekejufalakudogaloseja.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4918/files/99566703864.pdf
    • https://cdn.shopify.com/s/files/1/0437/1061/1607/files/76671851771.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61927850068.pdf
    • https://cdn.shopify.com/s/files/1/0438/2192/4514/files/86065415433.pdf
    • https://cdn.shopify.com/s/files/1/0435/9805/3539/files/49364258192.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/lotto_number_generator.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/nokenuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/28936502114.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/xakizududovabusoju.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/besulo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/wivorufufozujulawer.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_off00007a2f.bin
f7999428f179e471c8bb4c20dfcc653189c9fee64767ce02ca0aa34230860945
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2F 5052 bytes
font_01_sfnt_off00008b54.bin
2a0eebc57f61c8254f910d08c4295f7a522399affe93c8301e22e72d658dc79f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B54 13340 bytes