Malicious PDF — malware analysis report

Static analysis result for SHA-256 adcb7936e8370cea…

MALICIOUS

PDF

50.3 KB Created: 2020-08-25 21:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ac6ed66b7c774f7be2e1286fa32a455 SHA-1: 509201a25dc9fb033cc36e7f2171e1fecbb49417 SHA-256: adcb7936e8370cea3ea7076756dc9311dda994810f2437782d7e49a8063ab28d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is also present in the document body. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be luring the user to a malicious site via the embedded link.

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=sistema+operativo+android+pdf
    • http://files.leannwiggins.com/uploads/1/3/1/4/131438059/2125876.pdf
    • http://radosuki.charleybearproductions.com/uploads/1/3/2/6/132683228/vufoker.pdf
    • https://cdn.shopify.com/s/files/1/0431/6810/4610/files/xagubi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7779/4982/files/allyn_and_bacon_guide_to_writing_fiu_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/rojawukob.pdf
    • https://cdn.shopify.com/s/files/1/0433/4764/0469/files/79041261136.pdf
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/20174909704.pdf
    • https://cdn.shopify.com/s/files/1/0435/5561/8977/files/how_to_craft_a_sea_lantern.pdf
    • https://cdn.shopify.com/s/files/1/0432/2279/4395/files/vawuvagujagu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/person_centred_theory_in_counselling.pdf
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/fluke_1550b_manual.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_off00008671.bin
9b140ef3fdfc794c908851a4de6b5a014c79707792db89343fcc4d6e7ec1afd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8671 5320 bytes
font_01_sfnt_off0000986f.bin
028c15d9c40f8be6df6d0cdc83d4e5f6bc41bcd1f89a7cff7a2e69be80dd41e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x986F 10512 bytes

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