Malicious PDF — malware analysis report

Static analysis result for SHA-256 3deb6c18096fdcbd…

MALICIOUS

PDF

45.2 KB Created: 2020-08-30 07:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbf68839ff54c37ec525decea93c24e8 SHA-1: e0bf32590ff536f009f5497cf311f4d2756b5b2d SHA-256: 3deb6c18096fdcbdb2ed7396dfbb013ce9abfd6cba07400ee2ff64d037d49530
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure for a 'free company picnic flyer template'. The primary malicious URL identified is https://ttraff.cc/wix?keyword=free+company+picnic+flyer+template, which is likely used to redirect the user to a further malicious destination. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning attempt.

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/wix?keyword=free+company+picnic+flyer+template
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/79255094879.pdf
    • https://cdn.shopify.com/s/files/1/0438/5865/7430/files/gukepuxifalunadir.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6933/files/adrian_paenza_matematica_para_todos.pdf
    • https://static.usrfiles.com/ugd/b8c837_497dc99242c144dbba8b873bab2c1a97.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab2d59f632084276a5dc9f2cc36a11ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed59e422ec054ee081e18de4f03e6c5c.pdf
    • https://static.usrfiles.com/ugd/ce5d00_fa8161590e5f4b7c9a116eb2622624d1.pdf
    • https://static.usrfiles.com/ugd/c1de29_46033e27f2b74069a50caa04897233c4.pdf
    • https://static.usrfiles.com/ugd/99965f_5d590a56fea84deea2a6377e2498210e.pdf
    • https://static.usrfiles.com/ugd/23e9be_404a651b2b8c405cbbf48668798451d3.pdf
    • https://static.usrfiles.com/ugd/40512e_9c5eb8b9090f4de08925c62320f61ad4.pdf
    • https://static.usrfiles.com/ugd/b8c837_12857275daa547f985b9f3a9a749c05e.pdf
    • https://static.usrfiles.com/ugd/affb4a_f90685ece98a41eeadd0af6c44d427bb.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_off000074a5.bin
9f4d01ec38e25899443b27ddb431c48c42d49046850c4b0c77c8be851af95fe8
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A5 5040 bytes
font_01_sfnt_off000085b8.bin
8eb490ad2c6bf2d2b52b99889aee62370e0e978ebe46dab00d238e22e8d3a48d
pdf-font-stream PDF embedded font (sfnt) at offset 0x85B8 9912 bytes