Malicious PDF — malware analysis report

Static analysis result for SHA-256 f234096ce1109b35…

MALICIOUS

PDF

40.3 KB Created: 2020-08-04 18:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16af0682d687156159b1c82ae628bb4b SHA-1: 1e7745c7c12099941ba0e6a67857891ad296d025 SHA-256: f234096ce1109b35e35e19f52da182709fe4e2ab9b2ea5e6d168433ba341545c
152 Risk Score

Malware Insights

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

This PDF document is designed to appear as a free dictionary download, but it contains numerous embedded links. One of these links, https://ttraff.cc/pify?keyword=english+to+nepali+dictionary+pdf+free+download, is a known malicious redirector. The document's structure and the presence of a link farm indicate a social engineering attempt to drive traffic to malicious infrastructure.

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.cc/pify?keyword=english+to+nepali+dictionary+pdf+free+download
    • http://guwepape.monaghanlab.ca/uploads/1/3/1/4/131407535/1e11756.pdf
    • http://files.stpaulsspringvalley.org/uploads/1/3/1/4/131483685/mujagumeweburo_zenupobapar.pdf
    • http://files.ovalkorea.org/uploads/1/3/1/1/131164250/47c5b1d7e5e9ba7.pdf
    • http://files.andreapoe.net/uploads/1/3/1/1/131164456/0a29635d965.pdf
    • http://files.nedrapezoldroberts.com/uploads/1/3/2/3/132302892/d5fc7c52acd5188.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/74831741970.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7006/files/super_crazy_looms.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80278007767.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/stryer_biochemistry.pdf
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/35467598203.pdf
    • https://cdn.shopify.com/s/files/1/0435/0980/9318/files/quick_sort_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pawatofamilafal.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/93654574199.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1562/files/71454843462.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_off00005e82.bin
0ce4c638e4245493ab24cf360a2b7b66d8231b52032e78cb0ea78942499ded04
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E82 5568 bytes
font_01_sfnt_off0000718b.bin
09c33f357ae27c5f92c96554bf50b226a76a70e6cc5b056a710cdec41958afca
pdf-font-stream PDF embedded font (sfnt) at offset 0x718B 10024 bytes