Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3181b46bd3ba703…

MALICIOUS

PDF

44.6 KB Created: 2020-08-27 13:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a3e811f3a4657efecb32e1b68e876c4 SHA-1: 9b316c2689cff7e3e7465d55ac1737886019fe4e SHA-256: b3181b46bd3ba703851f966e5719b09470ad97bcef9e6ed832a9e452f492443d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, with a critical heuristic firing for malicious redirector infrastructure. The primary malicious URL is https://ttraff.me/pify?keyword=atlas+pass+no+mans+sky, which is likely used to redirect users to further malicious content. 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.me/pify?keyword=atlas+pass+no+mans+sky
    • http://files.hicksandslicks.com/uploads/1/3/0/7/130775635/rajorubo.pdf
    • http://sezizaxo.rideoutchem.com/uploads/1/3/1/1/131164497/5692134.pdf
    • http://files.wcbk.com/uploads/1/3/0/9/130969932/xepasaxobuto_kupotogomosunuk_vobuwamife.pdf
    • http://files.marylouromneyart.com/uploads/1/3/1/4/131483361/7929533.pdf
    • http://kejon.metachangetherapies.com/uploads/1/3/1/3/131397987/relagoragedogov_voromapixogobi_vifezemekil.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/kujojoreromutap.pdf
    • https://cdn.shopify.com/s/files/1/0440/1725/4558/files/jusikadu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0818/6792/files/ejercicios_abdomen.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4982/files/87723727404.pdf
    • https://cdn.shopify.com/s/files/1/0438/1645/2258/files/70380727514.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/4587678509.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/64461049570.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/85449495526.pdf
    • https://cdn.shopify.com/s/files/1/0445/3341/6095/files/30405314476.pdf
    • https://cdn.shopify.com/s/files/1/0435/5378/3957/files/.pdf
    • https://cdn.shopify.com/s/files/1/0437/8243/9063/files/algebra_2_textbook_mcdougal_littell.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/54365400908.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/jvc_kd-_sr41.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/lunch_break_policy_template.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_off00007224.bin
3853c92d3f86cb633bf9ff8846700ee48d3480b71537d6bc5c1a364223534e3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7224 5024 bytes
font_01_sfnt_off0000832c.bin
7926efd07ec1070ed2088f1c65476b6ce118a266f232727ecb88cb7ed6c73af4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x832C 10000 bytes

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