Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5e49688f648fd6…

MALICIOUS

PDF

37.2 KB Created: 2020-09-01 08:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31ac384975679e186b69c54e22fde71b SHA-1: 8ff31cb1900a8c067c1cdfd7256d2bed42c35579 SHA-256: 9a5e49688f648fd66af6dc4694e6addd24775b90e298447015372a0bbaf53995
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is also present in the document body and listed as an IOC. The document also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious redirector. The primary attack vector appears to be social engineering, using an 'escape room' lure to entice users to click the malicious URL.

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.com/pify?keyword=escape+room+1+level+34+answer
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xorufolikuvuzinekotawoxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/authority_to_sell_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/legadesonagired.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1943/files/fotinerobamapifigif.pdf
    • https://cdn.shopify.com/s/files/1/0443/0535/0812/files/law_of_buoyancy.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/vasivinire.pdf
    • https://cdn.shopify.com/s/files/1/0432/5939/6251/files/28472596487.pdf
    • https://cdn.shopify.com/s/files/1/0445/6002/3711/files/pagawaraxuposox.pdf
    • https://static.usrfiles.com/ugd/3826db_2ed513553d844b6ebb3318d8f269dd2a.pdf
    • https://static.usrfiles.com/ugd/a44510_0bdb4a32d2bd429897a2f2d8a40665ad.pdf
    • https://static.usrfiles.com/ugd/d5415a_1223e26c00aa43fe8d0b5120537bb90e.pdf
    • https://static.usrfiles.com/ugd/b8c837_92159ea240ab4638bb195d9e6b6e2f53.pdf
    • https://cdn.shopify.com/s/files/1/0431/9897/2066/files/mubalediruka.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/73188089766.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7048/files/new_updated_delhi_metro_map.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_off000053d9.bin
2dc3c1e8d29ca02729da6a97e8c0e98c8ddf8f4b313165585348c7da52368d7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x53D9 5492 bytes
font_01_sfnt_off00006698.bin
417ea867fa2580a4649be980fd750b3cbe7509494193460aef63e951ae2c276b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6698 9824 bytes