Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f19478e1c7fab5…

MALICIOUS

PDF

44.4 KB Created: 2020-08-31 09:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d909a18614735c6de342f70cf636caff SHA-1: 4667e3ba6e296511aabf3ff0d04e5dff793467b4 SHA-256: 74f19478e1c7fab5acc5bd4f9b9391670b0ea515d165f9dc1108e67632ebe700
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a game guide. This indicates a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious infrastructure.

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=grim+dawn+schattenklinge+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d162e3_56f8d7b77ef4441890f992ee6b01cec3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5334062b76041b4906fa610bd60d58a.pdf
    • https://static.usrfiles.com/ugd/c618e9_51a2798b091c413aa0b74bb9d809dc78.pdf
    • https://static.usrfiles.com/ugd/22739b_823a5949cce54020afb378ea98e58885.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/volinufegunomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/les_accents_en_francais_grammaire.pdf
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/10243408431.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/99741300545.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/6005/files/71280100570.pdf
    • https://cdn.shopify.com/s/files/1/0438/1098/0000/files/son_chiraiya_full_movie_720p_filmywap.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9685/files/ranelux.pdf
    • https://cdn.shopify.com/s/files/1/0438/6521/1035/files/ruwixofer.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8371/files/nojujeledazutabexo.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfa17985ca154f1aa7a4b9e967223679.pdf
    • https://static.usrfiles.com/ugd/dd4472_c8cffd5e57f74dd186e4a63258a2e098.pdf
    • https://static.usrfiles.com/ugd/e6092c_3d179d08e3054c34b65d29656852ce96.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_off00006fcd.bin
f792d823f1650013efe8d4ec8654f5622f72168fdd416f7e8bcace908610a94b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCD 5540 bytes
font_01_sfnt_off0000828b.bin
c3e87ff9c3e9a495054c11dbd7745a2ca2daf2a22ae91958b92cb1e5cb93a12c
pdf-font-stream PDF embedded font (sfnt) at offset 0x828B 9964 bytes