Malicious PDF — malware analysis report

Static analysis result for SHA-256 27323048e4492da3…

MALICIOUS

PDF

60.3 KB Created: 2020-08-15 19:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36ff5cc705a989b95f08d876761a3269 SHA-1: 37954273fe7c778a44450978d2442bc55d20637f SHA-256: 27323048e4492da334231230867088ac5b63a4914186b54d15c9bcd804e0017e
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding a large number of external links, many of which are hosted on Shopify. One of these links, 'https://ttraff.ru/wb?keyword=introduction%20to%20biblical%20archaeology%20pdf', is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text and embedded URLs, suggesting it is not intended for legitimate user consumption but rather as a vehicle for distributing malicious links.

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/wb?keyword=introduction%20to%20biblical%20archaeology%20pdf
    • http://files.rockyjohnsonlaw.com/uploads/1/3/2/6/132696145/zafiwijadexo_rimopad.pdf
    • http://muxiwiju.reardenrealestate.com/uploads/1/3/2/3/132303382/siwimem-ruwirerinog.pdf
    • http://files.mainecela.org/uploads/1/3/1/8/131856987/fexasobigamavow.pdf
    • http://files.snowsbendfarm.com/uploads/1/3/2/6/132681694/42f7418.pdf
    • http://files.conniesclassictouch.com/uploads/1/3/0/7/130776344/jajevukuri-puwipux-danoropumatuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8095/7598/files/dumbarton_vale_reporter.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/epic_training_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0433/8994/3975/files/celebrity_cruises_classic_drinks_package.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/7996/files/97968407932.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/98189628347.pdf
    • https://cdn.shopify.com/s/files/1/0440/3403/1766/files/zalip.pdf
    • https://cdn.shopify.com/s/files/1/0435/3907/1125/files/texiwekigoreto.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/mute_bot_discord.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/9761140520.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9585/files/46573680697.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/jspdf_autotable_header_width.pdf
    • https://cdn.shopify.com/s/files/1/0434/4764/8406/files/sejudolofo.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_off0000adc5.bin
d13c6419d73bd4a8ffff9f8dc6f84e50275a3061b32861017579b9a2b5256ece		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADC5 5416 bytes
font_01_sfnt_off0000c02e.bin
108a3ac2f43e539ccc3de9449711aab73793138b45a54d782fd10d67f313ee5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC02E 10548 bytes

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