Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbd63afb397b284…

MALICIOUS

PDF

115.1 KB Created: 2020-08-25 07:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2821aee8eb9ef75d491d487ba3918de3 SHA-1: 9841bfe23c56e5ba0d67bbf5c75c4b35dba720b5 SHA-256: afbd63afb397b2842a20434a872ca1f5436277ff3b52a15bff6d899f553b7c4d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is ttraff.com, which is used in conjunction with a seemingly benign topic to lure users. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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=application+of+genetic+engineering+in+environment+pdf
    • http://zixomot.makeyourselfunstoppable.com/uploads/1/3/1/8/131871745/zanirobiwanoku.pdf
    • http://mofaguf.aubsblog.com/uploads/1/3/1/6/131637316/kekizubefejan.pdf
    • https://cdn.shopify.com/s/files/1/0432/6840/7464/files/cloridrato_de_cetamina_bula.pdf
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/gezojigosudivovisuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6330/3575/files/lorirewajabebotidege.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/mapazedonemevex.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7762/files/71478202664.pdf
    • https://cdn.shopify.com/s/files/1/0433/4151/2855/files/jodovesotavilib.pdf
    • https://cdn.shopify.com/s/files/1/0432/3003/6123/files/bendix_brake_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0434/0862/1719/files/89232043731.pdf
    • https://cdn.shopify.com/s/files/1/0435/5555/3443/files/avengement_movie_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/39823068966.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_off000188d4.bin
177f2e24954f5cfe493d91ad2ffbb69fb3c6acf214e0e67163caa5161ddb6204
pdf-font-stream PDF embedded font (sfnt) at offset 0x188D4 5348 bytes
font_01_sfnt_off00019aea.bin
f1653f344167f3ad1902b79f4481f20fa5bf206dc0b2ad47159ccf95cf68f7ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x19AEA 10612 bytes