Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbc00e3e053c780…

MALICIOUS

PDF

42.6 KB Created: 2020-08-06 03:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1961dfe18c374b79fc571e67339ee2e7 SHA-1: 6f4aca2e68d8f8f6e83e2ed813af1b86415a846d SHA-256: 0bbc00e3e053c7805dc3dbf8051d03c93e14a4b19641dc36559fbf21b4fe57e2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to seemingly random PDF files hosted on various domains. One of these links, 'https://ttraff.com/pify?keyword=cinderella+man+questions+pdf+answers', is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document body is heavily obfuscated.

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=cinderella+man+questions+pdf+answers
    • http://files.sacredmusicfestival.org.uk/uploads/1/3/1/4/131454109/tuvuwamakera.pdf
    • http://files.shopdovetail.com/uploads/1/3/1/4/131438137/latofaj_xajine.pdf
    • http://files.fontaniemagazine.com/uploads/1/3/2/8/132815767/sorozufedu-rixifafokufonof-bemitopij.pdf
    • http://files.prowashmyrtlebeach.com/uploads/1/3/1/6/131606951/vologegufon.pdf
    • http://files.alisonledgerwood.com/uploads/1/3/0/8/130813301/wogumupozip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1674/1283/files/webcal_mlb_am_tix_redsox_schedule_full.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2674/files/what_is_gear_vr_service.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/komuvakagiverorudu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/dojuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/21298921993.pdf
    • https://cdn.shopify.com/s/files/1/0450/0927/2990/files/livros_sobre_minimalismo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/falerixelaxeveziwo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/45122439882.pdf
    • https://cdn.shopify.com/s/files/1/0440/4169/9478/files/figuresimakedos.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/benefits_of_franchising.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5545/files/54523157982.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/tuvupifuponi.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_off0000680b.bin
31e5d42c60ec0266184166a98b51b3eee4612d1db0eb148f3812964ddfc6cd12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x680B 5308 bytes
font_01_sfnt_off00007a08.bin
437261360b42a682a54fdbe3fdd5916e8d48ab1a8c0d24fc7c4ec75a3934592f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A08 10420 bytes

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