Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2d03565d5c4da0…

MALICIOUS

PDF

86.1 KB Created: 2020-09-17 00:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19d7f80d34663c6bd1f48c7ca9cb6893 SHA-1: 2fc1af8509969199082a7a36a89c6fe8f0d5b7a3 SHA-256: 2f2d03565d5c4da0a81502a3a57da6551ab35606b3b8f6e223eb7848653bc881
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a link to a known malicious redirector. The document body contains garbled text but includes the same URL found in the heuristic firing, suggesting it is the primary lure. The presence of multiple embedded PDF links also indicates a link farm strategy, common in SEO poisoning attacks.

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.me/wix?keyword=russell+county+va+public+schools
    • https://698f0198-70a1-4677-be39-b8a696bda4b6.filesusr.com/ugd/a6e5e9_333a0030322f402ba21c2a5fd1eed475.pdf?index=true
    • https://ca0bc82d-9f01-465c-94f3-98f0b2c4546e.filesusr.com/ugd/f08e01_97043ada5593470abc93e43b1aeadb1f.pdf?index=true
    • https://9bb4f8aa-1a06-4080-9ac0-19e8c9d2a9ae.filesusr.com/ugd/c8683e_dd41660b86384b50aa5cb8dc47fe7c3b.pdf?index=true
    • https://590ed869-6166-4ce2-8dd3-3456740c8055.filesusr.com/ugd/64bd79_3291bf26131b425fa91886981d01e7a5.pdf?index=true
    • https://77a8e08b-5473-4a44-a890-f4f852e57354.filesusr.com/ugd/f09a9d_8b126b1b7e8d4a3c8921140b5af54177.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33971068516.pdf
    • https://cdn.shopify.com/s/files/1/0432/2476/0488/files/sidesowebabapafidufabo.pdf
    • https://cdn.shopify.com/s/files/1/0482/7591/4913/files/57106167356.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/guvakiredarug.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2407/files/oracle_hyperion_interactive_reporting_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/horror_movies_hollywood_hd.pdf
    • https://cdn.shopify.com/s/files/1/0434/5059/7528/files/apache_poi_convert_to_word.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/6496735523.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6207/files/chick_fil_a_app.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_off0001068e.bin
dbdfdb804175dc4b4a3cefbcbc8572e00bad3f0a667483b6e5d2ca0149029d0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1068E 5232 bytes
font_01_sfnt_off0001186c.bin
f295e28ac2182788c531612e7c7edae60c85841d6cea6f3379d08ab3f50917cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x1186C 15652 bytes