Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fbce9642efeca0f…

MALICIOUS

PDF

45.2 KB Created: 2020-08-06 08:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4c35229fa0fbc42ad22a5dac08593ad SHA-1: 4ab204829543d7de6711978c40c37252643a8b0a SHA-256: 1fbce9642efeca0f2513a4be9a290780da7d10411aeb43574157ce1a8168bb91
168 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text fragments and URLs that suggest a lure, potentially for phishing or malware delivery. The presence of both a redirector link and a link farm indicates an attempt to obscure the final malicious destination and potentially engage in SEO manipulation for broader reach. The SE_MFA_LURE heuristic further suggests a credential harvesting motive.

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=itext+add+png+to+pdf
    • http://files.circleofwealthgroup.com/uploads/1/3/0/7/130775939/dumakizomek-mafaja-majavedisufupu.pdf
    • http://files.ruportpt.com/uploads/1/3/2/8/132814930/verixovav.pdf
    • http://files.rebeccakightlinger.com/uploads/1/3/1/3/131378950/4289301.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/buchungsstze_bungen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujufizolotedugogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/buteluwarupumipuvofibuban.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7806/files/lajisaxusomozigamanaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1576/files/wuxurizumomijawo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/biditulef.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/farapun.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8469/files/free_minecraft_gift_codes.pdf
    • https://cdn.shopify.com/s/files/1/0431/3088/0162/files/bebupulofezobakobijad.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/zezupi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/80489693116.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/gesikifinakejesow.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f8b.bin
af6d5bc77a630e131a08af3c87f5ab6979977bc13138d4af2e2d10ae2fc347c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8B 4908 bytes
font_01_sfnt_off00007062.bin
9cdd43beedc1dc62084f94840aa166520ce69ef5c2ffebb74058552a91a91443		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7062 9980 bytes
font_02_sfnt_off000092c4.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C4 16164 bytes

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