Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e723eec9895e97a…

MALICIOUS

PDF

44.7 KB Created: 2020-11-02 09:35:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 819aa6df626906e11b38da1ad8ac0c22 SHA-1: b38102b6814c0899869c59978d76964a709af5e1 SHA-256: 9e723eec9895e97ab5271c71987e8d3da0190a7d45877c42243172c5a8ed3774
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file contains a large number of embedded links, characteristic of a link farm, with one URL identified as malicious redirector infrastructure. The document body, though partially corrupted, contains the keyword 'Ohio license plates county number' and the malicious URL, suggesting a phishing or scam attempt to drive traffic to malicious sites. The ML classifier strongly flagged this PDF as malicious.

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://cctraff.ru/123?keyword=ohio+license+plates+county+number
    • https://cdn-cms.f-static.net/uploads/4379848/normal_5f8bd17054b97.pdf
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/sozikiju.pdf
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5f99ec23682ae.pdf
    • https://rebivawofud.weebly.com/uploads/1/3/4/3/134375894/bomareguwisavumopi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0503/1028/3437/files/36065483222.pdf
    • https://cdn.shopify.com/s/files/1/0434/6229/5716/files/patient_safety_goals_2020.pdf
    • https://cdn.shopify.com/s/files/1/0503/0739/9853/files/77308857125.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5029/files/52970921990.pdf
    • https://s3.amazonaws.com/zirojopemup/bienvenue_au_quebec.pdf
    • https://cdn.shopify.com/s/files/1/0478/3426/7807/files/bofate.pdf
    • https://cdn.shopify.com/s/files/1/0436/3331/1897/files/subject_verb_agreement_practice.pdf
    • https://cdn.shopify.com/s/files/1/0501/6957/7656/files/dapiwewovasoxiwu.pdf
    • https://uploads.strikinglycdn.com/files/399ea9e4-076d-41c6-a6e3-bf2a10096030/used_bookstore_tulsa_oklahoma.pdf
    • https://cdn.shopify.com/s/files/1/0484/4778/3077/files/osrs_f2p_pure_guide.pdf
    • https://cdn.shopify.com/s/files/1/0492/3690/2044/files/zutewejowolowomozesufiza.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_off000062d1.bin
c5ceee5a5882b9fb6b918c6d68bb2cb63dadb87653e060bb16131ae9c3d6dcf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D1 5324 bytes
font_01_sfnt_off000074b0.bin
8ecc6f7c8d4adc07f15cbdb571db13d7a0ba1f4dbb8e0c9050893c39cf4e53d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B0 10068 bytes
font_02_sfnt_off00009740.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9740 4324 bytes

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