Malicious PDF — malware analysis report

Static analysis result for SHA-256 2727a78597d46138…

MALICIOUS

PDF

45.0 KB Created: 2020-08-25 06:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17e189fc5e40758dae75bf3c261ade3d SHA-1: cef606096e776eb9ec31fe5cae26b979ef3223fd SHA-256: 2727a78597d461388273ec1cba9dd73e49e8992f3f87f291df72dc622508fda2
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though partially obfuscated, includes text related to interview questions and a URL that is flagged as malicious. The primary heuristic indicates the PDF links to known malicious redirector infrastructure, suggesting a phishing or redirection attempt.

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=sample+behavioral+interview+questions+and+answers+examples
    • http://files.chasethecrave.com/uploads/1/3/2/7/132741385/dinifametomifo-gupazezebip.pdf
    • http://files.ravenbeak.com/uploads/1/3/1/4/131437655/612f0471.pdf
    • https://cdn.shopify.com/s/files/1/0463/6924/3297/files/cessna_182_poh.pdf
    • https://cdn.shopify.com/s/files/1/0447/9270/9271/files/3386864046.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wirokole.pdf
    • https://cdn.shopify.com/s/files/1/0438/8664/1304/files/90485789000.pdf
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/blank_d_d_5e_character_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/21533467759.pdf
    • https://cdn.shopify.com/s/files/1/0449/4082/0635/files/rafivojaguzaxazudazozinu.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_off000070bd.bin
ad8948537ef84d5a43f0dd440d4575f6918bd0a6d92d4b5e8a7422a86c47da06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70BD 5788 bytes
font_01_sfnt_off00008454.bin
c04bf07879cf4b75c71389feeb8f83b2c7375b2e4dc82e3dc4ba2df37f2a5acf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8454 10272 bytes

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