Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b02c428bd9b77b…

MALICIOUS

PDF

43.7 KB Created: 2020-08-10 04:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd7377569779ceb93da9b8818faade3f SHA-1: b7660980b6a912c5527c0b4a7a4446e9eed6cdd4 SHA-256: 93b02c428bd9b77b131b99247b2a0a5f56bd8e07c83ed93b1765d5bd3a1bd65b
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'cabinet ministers of tamilnadu 2020 pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=cabinet+ministers+of+tamilnadu+2020+pdf
    • http://files.clasiladies.com/uploads/1/3/1/4/131454116/varibezapazoxij_xovarapi.pdf
    • http://files.oxbowriversnorkeling.com/uploads/1/3/0/7/130739251/bidisu_kuwadapaduju_wajunubu_metiwosa.pdf
    • http://files.thebetterbrasspipe.com/uploads/1/3/2/7/132740218/daf3e1d8396c143.pdf
    • http://niwebu.fundle.us/uploads/1/3/0/9/130969744/zuzilomiduwazawaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/wefaxiwedoraxoxima.pdf
    • https://cdn.shopify.com/s/files/1/0437/2473/4613/files/1170574545.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/testosterone_booster_foods.pdf
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/honda_ch80_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/548996096.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/69958365870.pdf
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/80732161006.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/47776536896.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9200/files/addition_table_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/xeravogegokugefizogas.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_off00005ef8.bin
eb142c6737c152e2deda38634ac66429d0e295fb01738cd7af14e0e6f107c961
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF8 5508 bytes
font_01_sfnt_off0000718b.bin
3f7943b9ef3c6c47b8b04cb6f5808c1418b37bb8a58be673d6ba56e93a843097
pdf-font-stream PDF embedded font (sfnt) at offset 0x718B 9816 bytes
font_02_sfnt_off00009328.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9328 4324 bytes