Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ca0c23b510e87e…

MALICIOUS

PDF

49.0 KB Created: 2020-08-17 11:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 929da2a14aa6cb69a08997e3ef4b7934 SHA-1: 0c7f781d459faf72c81bdca2f417064660d7e0f4 SHA-256: 63ca0c23b510e87e51efd25686cb455c4162c27d124f7cce9d7eac2a7a5b3edf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link disguised as a lure for a game hack. This link points to `ttraff.cc`, which is known malicious infrastructure. The PDF also hosts a link farm of 18 other PDFs, likely for SEO manipulation or to spread malicious content further. The ML classifier strongly flagged this PDF as malicious.

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=zombie+catchers+mod+apk+hack+version
    • http://files.pinegrovecogop.org/uploads/1/3/0/8/130874318/de351d21ce3806f.pdf
    • http://files.tasmanunited.nz/uploads/1/3/0/8/130874328/4484027.pdf
    • http://gujogo.gccvista.com/uploads/1/3/0/9/130969191/3318906.pdf
    • http://dadudub.sourenasefati.com/uploads/1/3/1/4/131407253/6794621.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/6322/9078/files/87005022644.pdf
    • https://cdn.shopify.com/s/files/1/0439/0918/5691/files/94216391013.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2005/files/yo_tarot_alejandro_jodorowsky.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/91858832876.pdf
    • https://cdn.shopify.com/s/files/1/0437/1048/0537/files/maneboxafodifumitij.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/detailed_engineering_design_instrumentation.pdf
    • https://cdn.shopify.com/s/files/1/0440/3917/6342/files/48273471775.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/basic_linux_commands_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0441/1890/0888/files/23418042147.pdf
    • https://cdn.shopify.com/s/files/1/0437/8358/5953/files/julubekukatitonom.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/22000719777.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/amrita_pritam_poems_in_punjabi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/distressed_ascii_face.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/97968233887.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007473.bin
42e34900d9dfed6d1d5d264bdd646b87c3590c6e4b424bac0e6e6f8cb84c8502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7473 5288 bytes
font_01_sfnt_off00008641.bin
77aa8e703392e0384ed775716f8ffbf5ee690b09e5a3410d15284d2f51b02834		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8641 10080 bytes
font_02_sfnt_off0000a8d0.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D0 4324 bytes

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