Malicious PDF — malware analysis report

Static analysis result for SHA-256 27352398da0e3070…

MALICIOUS

PDF

35.3 KB Created: 2020-08-19 13:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4e689212fdd7ed3c65d81643451424c SHA-1: de76df4a4280b3b7a628d357a0f8dc90fb021a80 SHA-256: 27352398da0e3070c61d759442602f13b9b3e373440e06a19a5389e4062900d8
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to distribute malicious content. One of the primary links, 'https://ttraff.com/pify?keyword=anjali+anjali+song', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful destinations.

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.com/pify?keyword=anjali+anjali+song
    • http://files.edisoncarts.com/uploads/1/3/2/6/132682051/c403e3.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/rock_star_supernove.pdf
    • https://cdn.shopify.com/s/files/1/0462/7093/9293/files/5036217549.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/96427207975.pdf
    • https://cdn.shopify.com/s/files/1/0432/4573/2007/files/sibamunedabizotujipok.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/44861487020.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/disetuxuxavepozobufelobid.pdf
    • https://cdn.shopify.com/s/files/1/0430/8667/6117/files/18722465080.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/nicet_level_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/53022229540.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76102764406.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7746/files/moxod.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/17579699714.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_off000048e7.bin
e8fe40c7c3e14bd9b577efc7ef24b010fbc983ca7babf66c5948c4b5377e8f4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x48E7 4820 bytes
font_01_sfnt_off0000595e.bin
96f79686c17cf42219b9d4158c9288cadb4ab460c36083dc1e5339d152ca6aeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x595E 12492 bytes