Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27cc7fa69b41731…

MALICIOUS

PDF

63.6 KB Created: 2020-08-19 12:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10faff1183053df9585a5de4e22335b9 SHA-1: 1a1622a1d3a0a69e7f45cdb10fc62cbb4c9220e6 SHA-256: d27cc7fa69b41731d0487b3bc793a90e3ddb1573147395fd558794a66eb192a8
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text and embedded URL suggest a lure related to an 'answer key'. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to distribute malicious content. The ML_NYX_PDF_MALICIOUS heuristic strongly supports the malicious classification.

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=bpsc+64+answer+key+set+b
    • http://jipume.deadstreamguideservice.com/uploads/1/3/1/6/131636648/fisukopusazu.pdf
    • http://files.absbrokers.net/uploads/1/3/0/7/130739202/3882014.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/60809383749.pdf
    • https://cdn.shopify.com/s/files/1/0433/9063/2101/files/die_blechtrommel_gnter_grass.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/lirobomumumodimonasug.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/social_media_tactical_plan.pdf
    • https://cdn.shopify.com/s/files/1/0438/6678/3904/files/rimudexef.pdf
    • https://cdn.shopify.com/s/files/1/0437/9751/2354/files/fesatuditemenijafif.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/kufirazaga.pdf
    • https://cdn.shopify.com/s/files/1/0434/7212/6104/files/bucket_elevator_parts.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_off0000bac6.bin
16fe208f0a332e667cf9966662913b019657b362609b66d96037c5f6359e791b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC6 5584 bytes
font_01_sfnt_off0000cde9.bin
12dd7e0628929b5d7f0c7a69b7b2b4db3a98525375b1ab353c6b7f1c9b22baf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE9 10500 bytes

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