Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aebd42613848611…

MALICIOUS

PDF

68.6 KB Created: 2020-08-16 23:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27c81dbf43fc5c2ee75de9c9b0417af6 SHA-1: 2c0599b924c016ddda920bf8cffae08138b79239 SHA-256: 5aebd42613848611ccd380a7fa1c0948a0e1d2b70bc671a26874eb1bdb1b9841
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.ru, which is disguised as a report. This suggests a phishing or scam attempt. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a malicious intent.

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.ru/pify?keyword=truth+and+reconciliation+commission+canada+report
    • http://kufufi.tikkuntokens.org/uploads/1/3/0/7/130775413/jubonudamedap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/84676189021.pdf
    • https://cdn.shopify.com/s/files/1/0447/1059/2668/files/58186663811.pdf
    • https://cdn.shopify.com/s/files/1/0438/6937/2576/files/fofoxudabipelifaxefup.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/biochemistry_test_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/9710/2238/files/ford_econoline_e_motorhome_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/9234/2939/files/shakira_belly_dancing.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/french_english_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0433/3279/6574/files/ridonugoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/sutokopumizabe.pdf
    • https://cdn.shopify.com/s/files/1/0438/9853/6091/files/wavezipidojelin.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/lugilubam.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_off0000ce31.bin
9dfafe11ed56a8e88977c97b36069a35d0074700f359ba6bf63d99770094d132
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE31 5260 bytes
font_01_sfnt_off0000dfdd.bin
66abbbab815530054a0a17d5a079bef375a106a17f5e01ab886eba4cdbfeb89a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDD 11004 bytes