Malicious PDF — malware analysis report

Static analysis result for SHA-256 9752f8e9e8c22c68…

MALICIOUS

PDF

45.9 KB Created: 2020-08-06 07:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c726442c2a8372db32ec4aa74bfb6742 SHA-1: f356c6056149a67ac2bbde3f68bd94b9a0c4137e SHA-256: 9752f8e9e8c22c68df566a07b8b9058e61815e2a87c4f02043960cefa321d9bf
152 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=encapsulation+oop+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to potentially harmful content. 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.com/pify?keyword=encapsulation+oop+pdf
    • http://tipowu.lauraguayartclass.com/uploads/1/3/1/4/131454012/5259864.pdf
    • http://files.lindasuskind.com/uploads/1/3/1/1/131164350/1531605.pdf
    • http://xuluris.langkildelab.com/uploads/1/3/2/6/132681488/2125599.pdf
    • http://files.theniser.com/uploads/1/3/0/8/130813612/gulis-dalovezotek-ziromaduvesexe-rubajafowanubi.pdf
    • http://files.beckeras.no/uploads/1/3/0/7/130740412/2104524.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/42230499520.pdf
    • https://cdn.shopify.com/s/files/1/0435/5378/3957/files/95240260732.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/tenavador.pdf
    • https://cdn.shopify.com/s/files/1/0432/8020/3944/files/adjectival_phrase_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/dapejewebit.pdf
    • https://cdn.shopify.com/s/files/1/0430/6219/8425/files/wabuwobofibokigoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/8449/7575/files/54608079625.pdf
    • https://cdn.shopify.com/s/files/1/0445/8492/7396/files/praying_the_names_and_attributes_of_god.pdf
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/green_lantern_blackest_night.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/ronaxamojixip.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/34705297608.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_off0000761c.bin
9d2e1c34b9bddc28eafd6ec7ee7bd5a74a06cdea791808267a0cd2b444a67e6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x761C 5008 bytes
font_01_sfnt_off0000873f.bin
582522ab55ce748894c33dea55528ecd575c81642521c954cbb8b9f741a7cf72
pdf-font-stream PDF embedded font (sfnt) at offset 0x873F 10316 bytes