Malicious PDF — malware analysis report

Static analysis result for SHA-256 e39441c20115752c…

MALICIOUS

PDF

34.8 KB Created: 2020-09-01 00:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1b76eeb6583021687f3b56743d68d6a SHA-1: 371dae1d1e748533d5e22415ed706b70c26696e8 SHA-256: e39441c20115752c6ce6ef64895719d5b408900066face230cc7e6634e89c311
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to malicious content. The document body, though heavily obfuscated, contains the same URL and references a 'hockey score sheet label template', likely a lure. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, and the PDF structure itself does not indicate specific exploitation, hence the confidence is not higher.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=hockey+score+sheet+label+template
    • https://cdn.shopify.com/s/files/1/0446/4692/4451/files/animal_cell_organelle_functions.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/necromancer_spell_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/4346/9974/files/didikakobapepimabevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/vabezawo.pdf
    • https://static.usrfiles.com/ugd/87fdc7_a68a09c812d4499da0307a8804335b6c.pdf
    • https://static.usrfiles.com/ugd/72b0e7_07ca3598c94c457c999d7cd8eb88a7d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_070ce2bf6836403db4bed0a752beced0.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b5dc8a808694101a998a10af16fb305.pdf
    • https://static.usrfiles.com/ugd/b8c837_1948a1f182a64a24bd371e375ea045b1.pdf
    • https://static.usrfiles.com/ugd/d78803_fb3cefd92e474040b7e70dc9ca0d1fc7.pdf
    • https://static.usrfiles.com/ugd/33ab24_7f14c1d7045344c4b113404d3ba0f784.pdf
    • https://static.usrfiles.com/ugd/bf650e_9f70ee17633d4d24be27954c505931cf.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_off00004869.bin
d99e0eb414051f246c12586a0a302a69df707fb2311384f6a317051c3755cb1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4869 5440 bytes
font_01_sfnt_off00005ac3.bin
833e02b2ff9fd1c5661de503a9759798535f0cd2a53435cc170b64f42aee082e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC3 10672 bytes

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