Malicious PDF — malware analysis report

Static analysis result for SHA-256 461154d984857f46…

MALICIOUS

PDF

51.1 KB Created: 2020-08-06 23:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e781474c41977e34cb96dba13559030 SHA-1: 1c2898c9538f2d5d05f7608a1f75a06fad4100dc SHA-256: 461154d984857f4693abe05e2373db395a194e532263a3d6ed01170601a7ba15
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm for SEO manipulation. One critical heuristic firing indicates a direct link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, indicating a deceptive attempt to trick users into clicking 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=graphic+design+bangla+pdf+book+download
    • http://files.jerrygarciafoundation.net/uploads/1/3/1/3/131398334/9322465.pdf
    • http://files.webuyjunkcarstrucksvansingeorgia.com/uploads/1/3/1/4/131406607/gadikumobaditazuz.pdf
    • http://jukodo.autisminmyeyes.com/uploads/1/3/2/3/132303230/5155032.pdf
    • http://files.zemanmfg.com/uploads/1/3/0/8/130813921/zemitog-rotora-xorozaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/mith_gloves_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/xerebeniveramomevupoled.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/14928229179.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/29128727208.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8731/files/geniwosope.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/voltage_drop_formula.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8903/files/68642590930.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/13187708432.pdf
    • https://cdn.shopify.com/s/files/1/0428/6667/1782/files/18293897166.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/98562446788.pdf
    • https://cdn.shopify.com/s/files/1/0429/6615/5430/files/budiwoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5842/files/vamojivesebopabofimawej.pdf
    • https://cdn.shopify.com/s/files/1/0432/9105/0137/files/pafodebokuzuzopa.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_off0000891a.bin
d34a3fcd3a66677d871d03a3537cdbef9384b9aab6b9805f49a9898157ce4372
pdf-font-stream PDF embedded font (sfnt) at offset 0x891A 5744 bytes
font_01_sfnt_off00009cb6.bin
c78ca953a03baabc95a156467f516a6f9037d86cbe4a6a5efadf6c58f068f472
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB6 10172 bytes