Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e50300a5a1f0dc…

MALICIOUS

PDF

42.1 KB Created: 2020-08-30 03:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c3d61da8b72a8354b3ec64a86416032 SHA-1: dc69ea2a05431df9fd9c5fde56fb5a4a0c3bc7ad SHA-256: e3e50300a5a1f0dc69c69986bc2887475b86b535d49b3f1383d943d3ed834473
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL identified is `https://ttraff.me/wix?keyword=skyrim+best+follower+management+mod`. The document body, though heavily obfuscated, appears to contain text related to the URL's keyword, suggesting a lure. The presence of a large link farm points towards an attempt to distribute malicious content or conduct phishing operations.

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=skyrim+best+follower+management+mod
    • https://cdn.shopify.com/s/files/1/0438/4037/2896/files/95066062142.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/84681618561.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/zutaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/1863/9765/files/vezis.pdf
    • https://cdn.shopify.com/s/files/1/0440/5487/2214/files/nugovulasubitinuk.pdf
    • https://static.usrfiles.com/ugd/158fb9_e445ac9ad275417fab71d51c2b5e1cf2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef21ab562a21423da427b2b5f7edfb67.pdf
    • https://static.usrfiles.com/ugd/b8c837_4abf592978054b1da6bc63980d4e3767.pdf
    • https://static.usrfiles.com/ugd/9c0842_e6d3d6e702924d1880fed88c27ee882c.pdf
    • https://static.usrfiles.com/ugd/b8c837_18454bd4b1a940c69a2745f16d8d8ce5.pdf
    • https://cdn.shopify.com/s/files/1/0430/9742/4026/files/19236237787.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/41378973205.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/27791858863.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5548/files/zomafamikazadesetidutor.pdf
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/zajibigaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/videsegabizurowezexekaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/6017544040.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2137/files/formule_chimique_carbonate_de_sodium.pdf
    • https://cdn.shopify.com/s/files/1/0431/6767/8618/files/nothing_else_chords.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_off00006476.bin
cbc9f22572962ea1348ccc3c969845ea4d51df41f801fd12bb8d8f51d7dd8e88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6476 5728 bytes
font_01_sfnt_off000077f7.bin
8119360bbf34c63ba337e0d1bd54d2347e62fe4c1e01a7e34705dbe80df1fae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F7 10348 bytes

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