Malicious PDF — malware analysis report

Static analysis result for SHA-256 cadb297b076ccb51…

MALICIOUS

PDF

39.8 KB Created: 2020-08-23 20:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cec38daa77e16aae1c1677b3a2ff089c SHA-1: f0165d4a38bf932c86789fb0075fc979633762d3 SHA-256: cadb297b076ccb5109f335d4b4d2ce22896b38b6dca9975adee9f2c560f4cb00
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text suggesting a 'Ct scan head normal report' and the malicious URL, indicating a lure to a potentially harmful site. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

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.ru/pify?keyword=ct+scan+head+normal+report
    • http://files.thelocalovengoodness.com/uploads/1/3/1/8/131871633/rozolifalabikukojeko.pdf
    • http://files.wadelightheart.net/uploads/1/3/1/4/131407278/sanidiwuwo_renig_vigiwapuvot_jabipezilape.pdf
    • http://jaxim.clayartspace.com/uploads/1/3/1/4/131407164/115d9cd08ed5.pdf
    • http://files.camarillochamber.org/uploads/1/3/1/4/131438899/97139404cfcb.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/lunonokurabetoxazamatuger.pdf
    • https://cdn.shopify.com/s/files/1/0437/9266/2688/files/body_organs_and_their_functions.pdf
    • https://cdn.shopify.com/s/files/1/0464/6843/2040/files/cis_hardening_guide_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/nogogufizegigadipizija.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/the_cask_of_amontillado_annotations.pdf
    • https://cdn.shopify.com/s/files/1/0436/0932/5730/files/59264422266.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/89441887977.pdf
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/hope_for_the_best_answer.pdf
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/13699479361.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_off00005eaa.bin
6303d101ea4add7c63d6620272c857052b8f541bc2e01784a4f48a526c734034
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAA 5220 bytes
font_01_sfnt_off0000702d.bin
27677cedf559c9b4f9e230b50b500fe45e1d7fd0748150a78dc0d97404e56b4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x702D 10108 bytes