Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b0fd2d97945fa3…

MALICIOUS

PDF

67.1 KB Created: 2020-08-07 21:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2722559f8ad40532edfbfc82a2b9e09f SHA-1: aac80c52d875e95cf6456aa98615612da1d0dadc SHA-256: c7b0fd2d97945fa3a531aa794089d0c65f60ea20f7f48cec6482fb3549271ba2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'Metal forming analysis pdf' and the malicious URL, suggesting a lure. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm indicates an attempt to manipulate search engine results or 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=metal+forming+analysis+pdf
    • http://files.ritosrepellant.com/uploads/1/3/2/6/132695445/7f1466aa.pdf
    • http://files.saxophonistforhire.co.uk/uploads/1/3/1/4/131453260/6fc49f6d6a4.pdf
    • http://files.aseslp2.com/uploads/1/3/2/7/132741535/gijipa-bunazijanirul-baboporatulotu.pdf
    • http://files.jonathanedgingtonwriter.com/uploads/1/3/1/4/131437157/nawalabolonalelam.pdf
    • https://cdn.shopify.com/s/files/1/0433/4115/2406/files/65646655167.pdf
    • https://cdn.shopify.com/s/files/1/0433/4292/1883/files/boccia_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2962/files/jubegetufarasav.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1187/files/79067747995.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/65110578286.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4199/files/aparato_respiratorio_de_las_aves.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/84385748293.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2519/files/datomi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/medallion_of_grand_marshal_morris.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_off0000c246.bin
102c0d4f8450a83772dcf30442d489e4bb2805947e82e359801d40aacb8e5f89
pdf-font-stream PDF embedded font (sfnt) at offset 0xC246 5468 bytes
font_01_sfnt_off0000d4e3.bin
fcbe4cc98acc3762c90698922bd706cabf3b44e48760d051d1bd11aa3bf720d9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E3 13372 bytes