Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b33905a76fefa5…

MALICIOUS

PDF

47.3 KB Created: 2020-09-08 22:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de100306ac06e889150f8c2be47119ef SHA-1: bd70bdf6f5eb1e432b91a0cd50e0d78992fe34fb SHA-256: 93b33905a76fefa5c2e4ba3b9b3d48acdfc11edf54de1399a62f0f88154ca6ae
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.club, which is likely part of a phishing campaign. The document body, though heavily obfuscated, contains text suggesting a lure for 'free video er for iphone 2019', aligning with the malicious redirector's URL. The presence of numerous links to static.usrfiles.com suggests a link farm or content distribution network used to host the malicious PDF or related 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.club/wix?keyword=free+video+er+for+iphone+2019
    • https://static.usrfiles.com/ugd/027f51_572b6f2c7e31477abdbc5e5f74dcad84.pdf
    • https://static.usrfiles.com/ugd/b8c837_32d3486222454cd68abd59b2f62f3870.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_f77eeac8cf9a4ca081e463b0f740e85d.pdf
    • https://static.usrfiles.com/ugd/b910ae_cf6e00428c894c85aff2c1b4e705edaf.pdf
    • https://static.usrfiles.com/ugd/b8c837_762337e21b2b4b40bb75596da384d484.pdf
    • https://static.usrfiles.com/ugd/65b209_e3eba0fc31424e8faf735abdd7d63152.pdf
    • https://static.usrfiles.com/ugd/2b25b5_a45712e97ca946df947df4fcf64bf381.pdf
    • https://static.usrfiles.com/ugd/cdfdba_334b9ca61d0d46be88b63e7589c162f5.pdf
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/eq_iksar_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1773/1229/files/monthly_household_budget_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/8416/9894/files/fufidosizososil.pdf
    • https://cdn.shopify.com/s/files/1/0441/1306/8184/files/26852775304.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3661/files/11569249935.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063aa.bin
b255dc2f10caa7cf961bab1172e8a2d2e5e83e097d684c71f73ac3a8f13737b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AA 2940 bytes
font_01_sfnt_off00006e28.bin
b86a9702ca02adc848184b9295cef5a96d961bd7047bcf677d24f2662c7e4e4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E28 4912 bytes
font_02_sfnt_off00007edc.bin
008082f6df78779a23a8fe148baf653980954307de5aa32eba91b2dcc395058f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDC 10308 bytes
font_03_sfnt_off0000a215.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA215 4324 bytes

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