Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd847bbad53986e5…

MALICIOUS

PDF

44.0 KB Created: 2020-08-18 15:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29c92c942010455c8e93287e1c190788 SHA-1: e7866510a3432719fdd87d783e222aa0b5f97819 SHA-256: cd847bbad53986e5dd5a3fd02c8942c785b01e0fcdf9591a6f1b06797718886c
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a resource for 'data analysis using sql and excel'. The ML classifier strongly flagged this PDF as malicious, and heuristic rules indicate it is a redirector and part of a link farm. The primary IOC is the malicious redirector URL, which likely leads to further malicious content or exploits.

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=data+analysis+using+sql+and+excel
    • http://files.caughtphotography.info/uploads/1/3/1/4/131409755/6bf8209a5.pdf
    • http://files.saloysius.org/uploads/1/3/0/7/130738704/4990799.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2063/files/19711134106.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0260/files/vafifolalejag.pdf
    • https://cdn.shopify.com/s/files/1/0435/2786/4469/files/battlefield_mobile_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6197/6994/files/97661568887.pdf
    • https://cdn.shopify.com/s/files/1/0435/2419/4468/files/body_dysmorphic_disorder_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/mibeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/29881422578.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/pujojamifagep.pdf
    • https://cdn.shopify.com/s/files/1/0459/2192/7319/files/89203872126.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_off000068a0.bin
4e19e5de42075909d59b665fff81c82667f398284f38b745c40b2c42fa11d6eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A0 5304 bytes
font_01_sfnt_off00007abb.bin
ceaf0a92828925a4c83982ae37149c90e970303d917d832288d626c2f6fc4940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABB 12668 bytes

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