Malicious PDF — malware analysis report

Static analysis result for SHA-256 32440ffdad31107d…

MALICIOUS

PDF

37.4 KB Created: 2020-08-30 12:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e40c95e3e3e553539dd51337892386ec SHA-1: 51aced42123e5d8782ccd4deb7eab7be37405d9c SHA-256: 32440ffdad31107d68820d2008a477a4d45719a174a4fda89570fe08776c9948
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wix?keyword=los+cuates+de+sinaloa+beso+al+viento, which is also listed as a malicious redirector. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files, suggesting an attempt to manipulate search engine results or distribute 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/wix?keyword=los+cuates+de+sinaloa+beso+al+viento
    • https://static.usrfiles.com/ugd/b8c837_9e1c61c51be84153849c08e21797f6cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_38a6bb7b146c43b8b4e38ab72ff395e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_a79300031340454fa1555e5f191688e0.pdf
    • https://static.usrfiles.com/ugd/48d9a1_d01cd8a1480c46e5b96b73c2d2533433.pdf
    • https://static.usrfiles.com/ugd/b8c837_896367473ce44bd59dd3671ef063cd83.pdf
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/easy_native_american_flute_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0461/9170/6263/files/66458854711.pdf
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/bethel_woods_seating_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/9178/6918/files/zawitobupasekapafefifal.pdf
    • https://cdn.shopify.com/s/files/1/0433/3371/4070/files/jozujedag.pdf
    • https://static.usrfiles.com/ugd/b8c837_6836a9617dd74fd388871391ef6bd062.pdf
    • https://static.usrfiles.com/ugd/a18aa6_e1ae3dc1ed8e41c6a883199cca4a34b1.pdf
    • https://static.usrfiles.com/ugd/8de238_169f27d0d2354e4593772ce19b97a228.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2c05fe871cd4a9784b5200d3a77d298.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_off000046a0.bin
337eb5991d2a8f4e8c0e55dc506ae67073b5f4ae12c3baa66a9f899dea834abf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46A0 4860 bytes
font_01_sfnt_off00005735.bin
22524fbcf1234894b46ab0903942facdbf71d9935cbb97cfeb7e14ab31663e75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5735 10228 bytes
font_02_sfnt_off000078ac.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AC 4324 bytes

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