Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe473e466df862d…

MALICIOUS

PDF

48.8 KB Created: 2020-08-13 22:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71cd2860efd48e180dd507e550854ac4 SHA-1: bfbdc7da5c2c2a10e51969653f6f6f6768d9f859 SHA-256: 0fe473e466df862d4bee308b86904058e5e54d9802751915e7ba022ec7948e5c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious redirection scheme. The presence of numerous external PDF links further suggests a link farm or redirection tactic.

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=interior+design+flyer+template
    • http://files.yoursongstory.com/uploads/1/3/2/6/132682528/sijalerajo_duruvolesabej_duvuponeno_ronuxufenov.pdf
    • http://files.brownisland.net/uploads/1/3/1/6/131637919/wapafumupe.pdf
    • http://rulojum.kathrynmarkey.com/uploads/1/3/1/8/131871505/5dd32420a68d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9705/4631/files/23965820814.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/ruvovegetigox.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3641/files/69377113995.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1609/files/how_weeks_in_a_year.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6818/files/miliseconds_to_seconds.pdf
    • https://cdn.shopify.com/s/files/1/0432/7912/2587/files/manual_trash_compactor.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/architecture_without_architects.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8330/files/jojuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/65188102666.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/vovaputiganun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/cbse_affiliation_bye_laws_2020_17.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4791/files/physiology_practical_book_free_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000801b.bin
af8e06b8309c201a4f4f1ec36872841f9fa9b3e7864272a099cb8b04ac7960ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x801B 5400 bytes
font_01_sfnt_off0000926b.bin
3949320238a6159cb78a77f89b3b88b09044c970a059ffbb7ccb014217c20499
pdf-font-stream PDF embedded font (sfnt) at offset 0x926B 10400 bytes