Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0753cc97a9e8c0a…

MALICIOUS

PDF

57.2 KB Created: 2020-08-24 12:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3272b20dd0e17c667f19c02a787aee9b SHA-1: 65360a3b89b99c7fe8e8548ceac47b6e5a5f8282 SHA-256: f0753cc97a9e8c0a8a11288ccc2247580479cfc071a0addef888559a7764a57c
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL identified is https://ttraff.com/pify?keyword=nikon+capture+nx-+d+user+guide. The document body, though heavily obfuscated, contains references to this URL, suggesting a lure to download or access 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.com/pify?keyword=nikon+capture+nx-+d+user+guide
    • http://files.darlingtonlecture.org.uk/uploads/1/3/1/4/131453213/pamarefizo.pdf
    • http://xufid.zoesternstillinger.com/uploads/1/3/1/1/131164312/kedakibenixoxof_kuliribufakimam_kolosivasal_safiwerepe.pdf
    • http://bozowetek.bajarallymoto.com/uploads/1/3/0/7/130738591/7449745e999f50.pdf
    • https://cdn.shopify.com/s/files/1/0434/3539/3191/files/wordly_wise_3000_book_7_lesson_10_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3616/files/5255538024.pdf
    • https://cdn.shopify.com/s/files/1/0430/4853/4167/files/baba_kotodin_kotodin_dekhina_tomay_song.pdf
    • https://cdn.shopify.com/s/files/1/0434/0937/5383/files/desi_desi_na_bolya_kar_dj.pdf
    • https://cdn.shopify.com/s/files/1/0444/5500/2279/files/brazilian_jiu_jitsu_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/99895066593.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/81690815104.pdf
    • https://cdn.shopify.com/s/files/1/0434/2670/9665/files/balloon_car_project.pdf
    • https://cdn.shopify.com/s/files/1/0429/6792/4899/files/81370946397.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/gagivujixose.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/sahih_al_bukhari.pdf
    • https://cdn.shopify.com/s/files/1/0439/5266/8830/files/7_network_layers.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_off0000a2ba.bin
88f47f179cabf0b2526b5a687bbd4fb9c249140f92675f7fabb65eff9f0a1997
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BA 5344 bytes
font_01_sfnt_off0000b4f7.bin
12dcb244937abcdc1669ffffddfd08fefe562826ec34551e60d80a5451f3e8e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F7 10200 bytes