Malicious PDF — malware analysis report

Static analysis result for SHA-256 b33815e039ddefcd…

MALICIOUS

PDF

49.6 KB Created: 2020-08-04 08:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d1f5f73bdbe13b0214c7854181142cc SHA-1: 22a84546d1a07ddfac2ccfff7296c91611e16c7e SHA-256: b33815e039ddefcd87f2ddbc08ef8d07f48696afafa978cb94ed1938c2212cec
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and other Shopify links, suggesting a lure for users to download content. The presence of numerous external PDF links further indicates a link farm strategy. The ML classifier strongly supports the malicious nature of this PDF.

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=ashrae+55+2020+pdf+free+download
    • http://files.elangamaker.com/uploads/1/3/1/4/131454034/guluj-wepisonud-lewivisafasezuv-dotapetegox.pdf
    • http://files.stephendoughtonfoundation.org/uploads/1/3/1/4/131406841/4756f72b16.pdf
    • http://files.beetdiggerwrestling.com/uploads/1/3/1/4/131438260/4386799.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/48861151507.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/vanilla_wow_cooking_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/5881/3341/files/96036926633.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/84483251702.pdf
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/how_to_turn_on_developer_mode_discord.pdf
    • https://cdn.shopify.com/s/files/1/0437/0939/9192/files/music_lover_synonym.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6305/files/92129788326.pdf
    • https://cdn.shopify.com/s/files/1/0437/5838/7349/files/sawozijapewepudodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/65898427184.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/all_email_domains.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/financial_risk_management_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0439/2402/9608/files/nakesetakodubejix.pdf
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/77831026064.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_off0000760b.bin
66ce3ae4ee2e7f37f85cb5fc7ae32a30bebd93a583aa36118fe56ba2e259fe35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760B 5268 bytes
font_01_sfnt_off000087f8.bin
50e0ed53fdbc6f0e44549bc07388fdc8e0c30586bd519f49d68e9b0b6bc474be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F8 10272 bytes
font_02_sfnt_off0000ab1c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB1C 4324 bytes

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