Malicious PDF — malware analysis report

Static analysis result for SHA-256 cebbc24378c6b8b8…

MALICIOUS

PDF

58.2 KB Created: 2020-08-15 00:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18a2572bf9788bfd420c93e178078372 SHA-1: f3212a9be0832043c7e019d493e9c2b9752481f9 SHA-256: cebbc24378c6b8b8299cc85f0d7721feda56e4bb66219728bad076c04e5f625d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=ansible+playbook+examples+pdf', is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to the same malicious URL and other PDF links, reinforcing the lure. The ML classifier also strongly indicated maliciousness.

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=ansible+playbook+examples+pdf
    • http://tatugipi.laurakramerlmhc.com/uploads/1/3/1/4/131437792/5762602.pdf
    • http://files.briannesandersphotography.com/uploads/1/3/1/4/131438190/zekagobob_nanutan.pdf
    • http://files.47secretstoayoungeryou.com/uploads/1/3/1/3/131381614/dozoguzirotinun.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9037/files/juretinoluwalesapigikedup.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/wastewater_treatment_process_primary_secondary_tertiary.pdf
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/bioengineering_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5669/files/tonaxebav.pdf
    • https://cdn.shopify.com/s/files/1/0437/4547/6757/files/49559320409.pdf
    • https://cdn.shopify.com/s/files/1/0435/9539/9325/files/jofutexezababepamumotidu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/ucsf_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/software_project_inception_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/64867924223.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_off00009b31.bin
6a341fd5265293a3a7f47c5f8299013ca638f67fc6e07b3f781b0a1b6236177c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B31 5452 bytes
font_01_sfnt_off0000adae.bin
957e79787b2748530efc262556afbc10bc742bf2e82773b70870c1eb9b5d31ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xADAE 15124 bytes