Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e6cd14cfc22c95…

MALICIOUS

PDF

116.3 KB Created: 2020-08-01 18:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8b4aa9f47c8a2288ee537ee5c5392bd SHA-1: b60eddbf9492b77694d91a5e1cd018d16063474f SHA-256: f1e6cd14cfc22c950d8866620a06e0ef164d2db091cd899dbeaebb5de7c0dbcd
154 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 clicking it. The PDF_SEO_LINK_FARM heuristic indicates a large number of similar links were generated, suggesting a campaign to distribute malicious content.

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=john+deere+lt160+parts+manual
    • http://files.dewittperryorchestra.com/uploads/1/3/0/7/130739598/b10fe.pdf
    • http://files.nbpeipublichealth.ca/uploads/1/3/0/8/130813997/lefowibenotaz_vinuserefugimam_rekazukovozejav.pdf
    • http://files.philoouweleen.com/uploads/1/3/2/7/132712413/witebabife.pdf
    • http://files.drydesign.co.uk/uploads/1/3/1/8/131871433/5679692.pdf
    • https://cdn.shopify.com/s/files/1/0433/3076/4968/files/33825332150.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5671/files/67969773860.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/wikebegukoxopotos.pdf
    • https://cdn.shopify.com/s/files/1/0436/8020/2905/files/lopufutafe.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/donafavotoxaluka.pdf
    • https://cdn.shopify.com/s/files/1/0437/5491/3943/files/seragabud.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/fapezawalibuwepudatawe.pdf
    • https://cdn.shopify.com/s/files/1/0427/9071/5548/files/xexakuwod.pdf
    • https://cdn.shopify.com/s/files/1/0439/5198/0712/files/kubolijizamogimiboje.pdf
    • https://cdn.shopify.com/s/files/1/0429/7362/6524/files/eigenvalues_of_symmetric_matrix.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/90923567762.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_off0001839b.bin
631fb00f5cddbb42b9ef135a0082d704f614a0df828d6db1faf88bda758dd618
pdf-font-stream PDF embedded font (sfnt) at offset 0x1839B 5536 bytes
font_01_sfnt_off0001963c.bin
643b0f5e38a11c324793bf199a1f4397cf9956db3da45d78e74681fa2ae155d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1963C 14840 bytes