Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b59f010dd64c5ec…

MALICIOUS

PDF

44.9 KB Created: 2020-08-31 22:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f83c50f621897c9722d9d2b45ad54061 SHA-1: fd17b466ac5753d6ecfcc753cc9dac152e2e3a1d SHA-256: 6b59f010dd64c5ec84b778dfdc7c19310cb6c3de49879dd3228cf6c7c8cbe110
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The embedded URL 'https://ttraff.club/pify?keyword=imo+messenger+apk+ios' is designed to trick users into downloading potentially malicious content. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a phishing or scam attempt.

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.club/pify?keyword=imo+messenger+apk+ios
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_5d758355a40747b78d801443d6e8c92f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6a3ec104de940039daacf2f0f0ef7af.pdf
    • https://static.usrfiles.com/ugd/9734e7_27c10d59ff754533b7732c1ef5b76c3f.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/26221216808.pdf
    • https://cdn.shopify.com/s/files/1/0431/6594/1917/files/27177891610.pdf
    • https://cdn.shopify.com/s/files/1/0437/3708/8154/files/electrical_manager_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0437/4796/7130/files/denikizisu.pdf
    • https://cdn.shopify.com/s/files/1/0463/4610/9089/files/10722785947.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1278/files/2421632433.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_04f4ed44df9a469e83e654b6162b40b5.pdf
    • https://static.usrfiles.com/ugd/e4a001_6eb4421054a3412c9a18148817102583.pdf
    • https://static.usrfiles.com/ugd/1f5cef_aa3f5e1046374de29af22981eb6053ef.pdf
    • https://static.usrfiles.com/ugd/8ab72e_80d6748ceed14b82914a478f3008e65c.pdf
    • https://static.usrfiles.com/ugd/238140_b1c77346bd174e4587112e6d8693767d.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_off000068dd.bin
86d969b63c70dd5a923cce7549c401ec27a43ebfc36a3ef3346ab2fb0099011f
pdf-font-stream PDF embedded font (sfnt) at offset 0x68DD 5108 bytes
font_01_sfnt_off00007a1f.bin
7c4880219e9625d2a4e9dd9baa4d28a857a57833d139bcdeda5c52338edb6e7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1F 1964 bytes
font_02_sfnt_off0000832b.bin
372991ee1d6dcb3184098570ae2deab5ff4f65376fd2c3740444ea548f2b631c
pdf-font-stream PDF embedded font (sfnt) at offset 0x832B 10184 bytes