Malicious PDF — malware analysis report

Static analysis result for SHA-256 880095f13dddf8fb…

MALICIOUS

PDF

47.5 KB Created: 2020-08-02 15:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30639b4e75bf835a51ee477dd98a698f SHA-1: 36705fe4e38840476136ca50f98a2b76452e7edb SHA-256: 880095f13dddf8fbe2df4d37e224e9e2efc8de61ae0ce12bc8755652f244bb60
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a link farm designed to redirect users. One prominent URL, 'https://ttraff.cc/pify?keyword=python+count+list', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a lure to external, potentially malicious, content. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=python+count+list
    • http://files.mojoecafe.net/uploads/1/3/1/8/131872273/d6040ac4dcf2.pdf
    • http://files.kentmcfann.com/uploads/1/3/2/6/132695629/zoridub-tosirumifagifek-zunovodexudib.pdf
    • http://files.fatutoanutrition.com/uploads/1/3/1/3/131398154/gerileve-tijaxejor-fegajozolewaw.pdf
    • http://files.elizabethashdown.co.uk/uploads/1/3/1/3/131383426/8648151.pdf
    • http://files.cruiseandtravel.eu/uploads/1/3/1/8/131858045/3ef87dd1a51.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/manosi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/15168169383.pdf
    • https://cdn.shopify.com/s/files/1/0432/8371/0108/files/32672556573.pdf
    • https://cdn.shopify.com/s/files/1/0434/0714/7162/files/jagurodopigobomawakupuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/72093494144.pdf
    • https://cdn.shopify.com/s/files/1/0437/8384/8097/files/67542128582.pdf
    • https://cdn.shopify.com/s/files/1/0437/3856/2712/files/xupolexabiwerusozobire.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/ispostback_in_asp_net.pdf
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/dojazuzatumubenu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/91969487679.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/bagisokexep.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/pimuzefitujatuni.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/putawapu.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_off0000731e.bin
926b9aada78cd6e46e20ab14261cd817593985b345d45fc0c636a128b440dae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731E 4684 bytes
font_01_sfnt_off0000831b.bin
d66861c39c8e9a86bcc5061373a94aa8cb7bbdcbba1aab31bb26dcbcc8c4efc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x831B 14484 bytes

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