Malicious PDF — malware analysis report

Static analysis result for SHA-256 016d05fc8eeb0d0e…

MALICIOUS

PDF

59.2 KB Created: 2020-08-06 01:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 779b09e49374a839b3d939fb6040ca95 SHA-1: c1a2350ee1ee5e79b97d74bfbdfcb607ae089cf4 SHA-256: 016d05fc8eeb0d0e266a5934c894c9b6462fb8b55a24accf8dbb4d267aa53a0f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms a link to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection chain.

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=telugu+christian+books+pdf+free+download
    • http://files.nickpateras.org/uploads/1/3/2/7/132710655/d914f150ae.pdf
    • http://files.travelagencyiowafalls.com/uploads/1/3/1/4/131453967/nokupepifipiwopake.pdf
    • http://files.chriseberhardt.net/uploads/1/3/0/7/130738836/fe02ed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0605/7888/files/pebovuwukefej.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5447/files/47287052635.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5622/files/75494544536.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/89384034575.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/50704692949.pdf
    • https://cdn.shopify.com/s/files/1/0438/4319/0944/files/technical_writing_course.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4551/files/96068810657.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/84585973674.pdf
    • https://cdn.shopify.com/s/files/1/0435/1141/4943/files/mujumekubedonej.pdf
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/60415865186.pdf
    • https://cdn.shopify.com/s/files/1/0428/7938/5756/files/jovaze.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_off0000a7e1.bin
0e8fe1c50b4992b33d9925af4c0112e7cd399da4529b31e7274516d85f53b646
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E1 5660 bytes
font_01_sfnt_off0000bb29.bin
f2fa294899b44f1f653afd23d47eeb6684646e4c630c7ee1ac476a9eb46647b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB29 10680 bytes