Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a9757452a544c4…

MALICIOUS

PDF

38.7 KB Created: 2020-09-08 09:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff4439c83306c27cbe767e4b20cc081d SHA-1: 37d7a902210b19290aabb92f2155ad95f0b81e4d SHA-256: 11a9757452a544c43afe01fd9a6c1f42e017c1bdf17fbc0f9364d5cdb1cb05d0
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, indicating a phishing or malicious content distribution attempt. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to drive traffic to potentially harmful sites, possibly for SEO manipulation or to host phishing content.

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.club/wix?keyword=choomantar+ho+song
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/40392997164.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/beredirinu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/aldi_job_application_online.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/nimuxugejik.pdf
    • https://static.usrfiles.com/ugd/0a51c1_91f10a22963a432790a8c904c1a7752e.pdf
    • https://static.usrfiles.com/ugd/105a8c_5696506c55854362bde9623eba1f1e0c.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8359/files/5232346204.pdf
    • https://cdn.shopify.com/s/files/1/0431/4552/7445/files/41345008671.pdf
    • https://cdn.shopify.com/s/files/1/0448/1833/3858/files/berserk_of_gluttony_manga.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3413/files/definitions_of_educational_psychology.pdf
    • https://static.usrfiles.com/ugd/accd1f_b2fd6e09175b43ae933ebec0324c0ba0.pdf
    • https://static.usrfiles.com/ugd/80c1db_d7326c073994443a991a7ca85b8bbfd1.pdf
    • https://static.usrfiles.com/ugd/c0518c_30ffe7479515443095f959da5bf019a7.pdf
    • https://static.usrfiles.com/ugd/05301a_3a81c161b4f14e38b60763654612688a.pdf
    • https://static.usrfiles.com/ugd/7ad284_11e2bcec9c364e01880bd48ea27ed87a.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_off000055f1.bin
e2548517ea5bc69301ada472e71d245e1c31d2dbbe62b49ec094de228c1288ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x55F1 4972 bytes
font_01_sfnt_off000066a0.bin
f7add5c07aa4d093acd4d48cca36e6cd8fe4e139cbc698907a4dd01f7f564d6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x66A0 12444 bytes