Malicious PDF — malware analysis report

Static analysis result for SHA-256 72acfbba8cb40ca0…

MALICIOUS

PDF

44.7 KB Created: 2020-08-05 01:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 621932ae030951d89c7f4d2b158880f3 SHA-1: 5137a02691f877f2e7b8f8f411eafe94fb6d30a1 SHA-256: 72acfbba8cb40ca0644d4c45ac6539f94ce917365ecc6129a3e356a60a5479b9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links designed to redirect users to external content, with a primary link pointing to a known malicious redirector. The document body, though obfuscated, contains text related to a "Balance general" example, suggesting a lure. The ML classifier strongly indicated maliciousness, and the presence of many embedded URLs points towards a link-farming or redirection attack. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.ru/pify?keyword=balance+general+ejemplo+pdf
    • http://files.northpointpsychology.com/uploads/1/3/1/6/131606256/d13ec37.pdf
    • http://files.jasminkwan.com/uploads/1/3/1/4/131453248/kubomerebamel.pdf
    • http://files.rapidrealestatevideo.com/uploads/1/3/0/7/130739280/nameki_pomepopujanu_suguxipir_selulimer.pdf
    • http://files.santasjinglehouse.com/uploads/1/3/0/8/130873820/2641892.pdf
    • http://files.visualisenewzealand.com/uploads/1/3/0/9/130969389/7966416.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/42152435777.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/kuvelizaritonekugowevino.pdf
    • https://cdn.shopify.com/s/files/1/0433/4003/8302/files/gabalubutaninus.pdf
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/67800627666.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/sabemalarodagafaxisul.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/ehlers_danlos_syndrome_types.pdf
    • https://cdn.shopify.com/s/files/1/0432/5828/2152/files/blacksmith_leveling_guide_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/0291/9074/files/vosifuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/1945/9998/files/22965471376.pdf
    • https://cdn.shopify.com/s/files/1/0434/4522/3581/files/39468718188.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000674f.bin
c63a71c735f417c2388f237e068505177fc612582d654283578c575b5c8375f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674F 5424 bytes
font_01_sfnt_off000079ab.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AB 1800 bytes
font_02_sfnt_off00008239.bin
5f932ec40108fc167f8d4ef955d2c6be1ac53244f4746f84d530d0e0b6cb0a8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8239 10380 bytes

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