Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df2d01cf1b1ce6f…

MALICIOUS

PDF

39.9 KB Created: 2020-08-31 20:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 245d29a0b51aa9b50c4cca7bf298f452 SHA-1: d757cd66fb191ce4f8a289f7d20e903f41131ecb SHA-256: 4df2d01cf1b1ce6f573cb8f8fdcc1de65ae6224dc937d4dd8364908394353dbf
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, disguised as a church service program template. This indicates a phishing attempt to redirect users to malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious URL is sufficient for this assessment.

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/wix?keyword=sample+church+service+program+template
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/34047616057.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texigusowemojegovivek.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/resumen_de_bacterias_microbiologia.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/52339987616.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/91257182738.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/ruvunekaxavofetuxa.pdf
    • https://cdn.shopify.com/s/files/1/0440/6624/2710/files/dinugar.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/bisubadopegugirutanan.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/31998169982.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakuxosisubesabemobaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5841/4236/files/fakinamo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/xujeb.pdf
    • https://static.usrfiles.com/ugd/f459ea_dc7739ca329348b4b50a1658fadeed33.pdf
    • https://static.usrfiles.com/ugd/d775a9_d52b620a91dd405c90fcc6bb10f8fee2.pdf
    • https://static.usrfiles.com/ugd/b8c837_86fd3b4a1b0e47df8cd87c2ef50731de.pdf
    • https://static.usrfiles.com/ugd/b8c837_c53108760e8247c1b5c84235ab6bbfbc.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_off00005fc6.bin
67ca18ad87122c01cccf3c7fdaa925c48de7d70c5c0f9cc2a879da4760dcdfcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC6 5512 bytes
font_01_sfnt_off00007255.bin
feb03a70716f80eb41085bef10d24b05fe2708a57eff034ff155abe8dab6d5a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7255 9568 bytes