Malicious PDF — malware analysis report

Static analysis result for SHA-256 6202a42c2d471e46…

MALICIOUS

PDF

51.9 KB Created: 2020-08-17 00:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59c36bf6ea623327261b9edfb81eb6ba SHA-1: d82c1c63ed0eeb55eb2a0e787da0c3bf058ae890 SHA-256: 6202a42c2d471e46a23e2ae7ef578f3c86d5a2e16a48075796328b26f183daf4
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body and embedded links suggest a lure related to 'Call of Duty Mobile 2019' to entice users to click on potentially malicious URLs. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points to a link farm or redirection scheme.

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=call+of+duty+mobile++2019
    • http://patutumur.tuttlelibrary.org/uploads/1/3/2/8/132814930/jibubeloridiluwiter.pdf
    • http://tuwofebu.coldaston.com/uploads/1/3/0/7/130739704/xuvibubuwube.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3976/0285/files/urc_8820_cisco_codes.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/risc_v_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0437/6317/1485/files/tevewuboralutuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/tidunapezif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/5487115651.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/20785635927.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/54762972902.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/godisuxedebixufil.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/80765380866.pdf
    • https://cdn.shopify.com/s/files/1/0431/9045/2387/files/52601233688.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a9b.bin
9634097a74339810052ae1b9a64465c86aa1122f1f5294963b8b02f5c3847106
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9B 5408 bytes
font_01_sfnt_off00009d00.bin
8712cf2d77d1bae321d0b0b79e415c6a23b066733a50adcb6ab4939e936d73e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D00 11224 bytes