Malicious PDF — malware analysis report

Static analysis result for SHA-256 70019bbacfbda06a…

MALICIOUS

PDF

38.0 KB Created: 2020-11-02 09:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e785d40bc194680c7406f96326c8dae0 SHA-1: 80c9a1ae9cd7eb14782c52d8d8e865f4f1459631 SHA-256: 70019bbacfbda06afcb9cde94f771a990e26bebcce08cb6e759ca1aecf2610b6
174 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a 'mcps classroom login'. The document also features a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness, and the presence of embedded links points towards a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.link/123?keyword=mcps+classroom+login
    • https://rajerese.weebly.com/uploads/1/3/4/3/134387708/mojevefozuvapiki.pdf
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f8a0f062ae86.pdf
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f8ce727b1963.pdf
    • https://musazowoxagaw.weebly.com/uploads/1/3/4/3/134323980/zosatituku-rirofekemuras-potamufakezo.pdf
    • https://cdn-cms.f-static.net/uploads/4389097/normal_5f9caa2a85342.pdf
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f8dee714a6d4.pdf
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5f8fda6343c10.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/kakekojezutok/74035830759.pdf
    • https://s3.amazonaws.com/tesodagiwor/battle_of_the_books_2019-20_list_wisconsin.pdf
    • https://s3.amazonaws.com/degagaziv/bharat_ka_map_in_hindi_download.pdf
    • https://s3.amazonaws.com/mufukep/wimivoke.pdf
    • https://cdn.shopify.com/s/files/1/0502/2593/8601/files/minecraft_story_mode_season_2_apk_obb.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_off000048e2.bin
b1837a7adae84c67a1710b913fb330883ac1b781c890a20712c9d219184bd3c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48E2 4848 bytes
font_01_sfnt_off0000592e.bin
beb91209cbbd9cbbae652d7df267f7d7728d946ff40f1fe01b9021eb9af1a34e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x592E 10856 bytes
font_02_sfnt_off00007d8f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8F 4324 bytes

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