Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3342297e12a945…

MALICIOUS

PDF

49.6 KB Created: 2020-08-27 20:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cd6f7acab0d260c572a45655a21e727 SHA-1: b12368cb4c6a92dbe08feb01c08b1cdb5e85e62d SHA-256: 2d3342297e12a9454f24f5c01271949ff475da4f4b6194fe3a8a0529e3560177
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for '3ds emulator pokemon y'. The document body, though heavily obfuscated, contains the target URL and a list of other PDF links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, and heuristic rules confirm it links to known malicious redirector infrastructure and employs a link farm technique.

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=3ds+emulator+pokemon+y
    • http://kemaroz.theearnestoptimist.com/uploads/1/3/1/8/131872203/wedezorami.pdf
    • http://manuges.soviet-shrek.com/uploads/1/3/1/4/131437605/e716e871166a5.pdf
    • http://files.amytsaidesign.com/uploads/1/3/1/1/131164132/c25e258207.pdf
    • http://mowifujad.housecleaningmakeover.com/uploads/1/3/2/7/132710773/6d4e7654393.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/goxaparum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/water_and_wastewater_management.pdf
    • https://cdn.shopify.com/s/files/1/0439/0794/0520/files/nufeborijam.pdf
    • https://cdn.shopify.com/s/files/1/0429/9279/5801/files/87017322749.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/ecology_and_environment_pd_sharma_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6023/files/infrastructure_as_a_service.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/85024190597.pdf
    • https://cdn.shopify.com/s/files/1/0437/6628/4439/files/batman_1989_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0437/1418/3323/files/pressure_points_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/6753262252.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/41618674860.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_off000068a9.bin
b578ca989edc8019a6761b8ffc46ba0ef1e486ce716066e608673fd94ccd1a27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A9 3840 bytes
font_01_sfnt_off00007656.bin
8b8d2ed7c9b5b3ba350a8da67ed7c323f77a83cded6180d02af14c611fc4e485		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7656 5340 bytes
font_02_sfnt_off0000886b.bin
18fafa8568ce2c93dcbc4daeaca56f1e85281c4276f0406977982e7eb9ad7e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x886B 14896 bytes

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