Malicious PDF — malware analysis report

Static analysis result for SHA-256 36902f9d0e3e46b5…

MALICIOUS

PDF

65.4 KB Created: 2020-08-19 12:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3626ca3239f27f7feb65bd559718ad69 SHA-1: 6262a5022bc5edc37a0a4967f931f8512bfad349 SHA-256: 36902f9d0e3e46b5bbe0e76711eb0574fd2558c4be8a493db0119896a4bffe0a
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL which is likely intended to trick the user into believing it is a legitimate report. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a phishing lure using a fake report to drive clicks to a malicious redirector.

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=kering+group+annual+report+2016
    • http://ponup.llbphotogs.com/uploads/1/3/1/8/131856713/7890427.pdf
    • http://files.queenofthewaves.net/uploads/1/3/0/7/130740392/gepasatejapijo.pdf
    • http://files.ralphschoellhammer.net/uploads/1/3/2/6/132695519/vawuwoworil.pdf
    • http://weguzo.thebackpackgirl.com/uploads/1/3/0/8/130874218/vubunalenax.pdf
    • https://cdn.shopify.com/s/files/1/0434/3778/5240/files/44639566554.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7569/files/51274026494.pdf
    • https://cdn.shopify.com/s/files/1/0437/0182/9797/files/rekipuverefarusigixej.pdf
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/91708611144.pdf
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/german_to_english_translation_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/rokewi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/68754539503.pdf
    • https://cdn.shopify.com/s/files/1/0432/4750/1474/files/pabupalanorokoderadav.pdf
    • https://cdn.shopify.com/s/files/1/0432/8076/0990/files/56898533523.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/62888426174.pdf
    • https://cdn.shopify.com/s/files/1/0440/0021/5190/files/folasetabipe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/91706998661.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_off0000b513.bin
d35e02c1242099653d1bf607eb5106369c80edf1c09104f051741392b8c24db3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB513 5256 bytes
font_01_sfnt_off0000c710.bin
ea880436da0c9268d3ab7618be360b779ac1d3ecaa94a83591964f33b00417f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC710 15724 bytes