Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5cd560a2dbe34f1…

MALICIOUS

PDF

46.0 KB Created: 2020-08-05 11:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db0eed3a6c6bb6754bd2c78ba8e96f98 SHA-1: d06ebdb0440c37430061fbcd485716c8de1dae09 SHA-256: e5cd560a2dbe34f164030dbc639992c1a73e98bd328687b8e9784259dbd78b04
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.cc/pify?keyword=agatha+christie+hercule+poirot+s+christmas+pdf, which is likely used to deliver a secondary payload. The document body, though heavily obfuscated, contains references to the book title 'Agatha Christie Hercule Poirot's Christmas' and includes numerous URLs, many hosted on Shopify, likely to appear legitimate. 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=agatha+christie+hercule+poirot+s+christmas+pdf
    • http://files.naplesbesthairsalon.com/uploads/1/3/1/6/131636954/dibuki.pdf
    • http://files.jameskpolk.net/uploads/1/3/1/1/131163872/672a064456.pdf
    • http://files.brentolstadmusic.com/uploads/1/3/1/4/131453432/23d8482da839b2.pdf
    • http://files.thegiftofthestruggle.com/uploads/1/3/0/7/130738652/fd22003.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/wugoxeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/4754/1146/files/field_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/troy_built_snowblower_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9067/3813/files/meririsobuvojavexiwolimaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5771/7152/files/62430764676.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/70006055705.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/52583609445.pdf
    • https://cdn.shopify.com/s/files/1/0437/2843/7409/files/93065152894.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/27922272326.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/tapemenawipatepuranaxuw.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_off0000660a.bin
5ed6bd86346e456dea0ff4eb6ee2b8fd54ce99c6d9b72d73b3cc6a8f57b3d21c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660A 3928 bytes
font_01_sfnt_off000073f9.bin
e033717a718300936e6fb8b970f55fcd2eac28b6af6c5a1ac58876520809a7a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F9 5556 bytes
font_02_sfnt_off000086b9.bin
e53350ddfcd9f9e9846a76939cac8b9c71fe46343bcf8ffe523fae7a15b88903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86B9 10420 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.