Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9b7bba305487bf…

MALICIOUS

PDF

37.6 KB Created: 2020-09-17 10:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7397fe5ac4d77ed6d9802d4cfac21d36 SHA-1: e4ff5327f805cf206a21108eda6c98b1bdb90f51 SHA-256: 0d9b7bba305487bfa5eed8c66cba0e4b0181b660a073698f50d194c9e8702137
174 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to a book title, likely to disguise the malicious intent. The presence of numerous links, including one pointing to a known malicious redirector, strongly suggests an attempt to lead the user to a malicious site for phishing or malware delivery.

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.club/pify?keyword=group+dynamics+forsyth+7th+edition+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b7e5ce92-ffb5-4d6d-ac7b-a40aafe65195.filesusr.com/ugd/28b3f7_01b2e99abe3f4ba5905adf760526851c.pdf?index=true
    • https://13cffb50-6487-473f-b227-07ba93cfabd1.filesusr.com/ugd/0286dd_4365b4cfc1e64dbebb43509437884e85.pdf?index=true
    • https://b271ee95-a830-47ce-b829-9acfa44d48c9.filesusr.com/ugd/69695d_437f382da57f42bf97f17de33afd3121.pdf?index=true
    • https://a90a84c0-1026-47c8-9174-5dadc6517aa3.filesusr.com/ugd/c83fdb_24babe4e561f470f9104107f3eb68389.pdf?index=true
    • https://311d7451-bfc6-4125-bbde-e32824948bb5.filesusr.com/ugd/d162e3_5e16b0a81d4142719b9e194023ec5ee0.pdf?index=true
    • https://85bfc7e1-9213-492b-a604-d4eae650b78d.filesusr.com/ugd/90c678_8cf794ee10194d4883518c8e9b31710a.pdf?index=true
    • https://e0e7b44c-407a-48b7-b460-0cdfc39ef8cc.filesusr.com/ugd/8a4248_b583550fd9e64735ad570b8249eb36d1.pdf?index=true
    • https://664b6c7b-e605-4257-9357-444ee19cc541.filesusr.com/ugd/a98ecc_7489333e597e4946b4ee2f7d83e91120.pdf?index=true
    • https://5f5cc535-c0c1-40c7-9db6-7224fb36ce53.filesusr.com/ugd/b0c717_51561a91897443629ae353600741fd28.pdf?index=true
    • https://ecaf6ee9-1060-4329-a2c2-b1b638696141.filesusr.com/ugd/7ef0dc_4add34d410a740d7b5c4f8c364ef9738.pdf?index=true
    • https://7a0ff253-f50a-44fe-9828-9d711dc0d09a.filesusr.com/ugd/4479ed_3a47640f314b40deb8f161634f0df089.pdf?index=true
    • https://cd0b7792-03c8-4f48-8fd6-2681d8bf86b7.filesusr.com/ugd/4c7633_bf907b8a8aaf414bb956058843b776d2.pdf?index=true
    • 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_off000052a6.bin
43c5eef6f349e5d7fdc212fbd86d8db834abe7124592479431bd54e3408d22e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52A6 5576 bytes
font_01_sfnt_off0000658a.bin
660b25530c27b252a87ba2e34d8e0d7ef04f16e97a6e3ec63d505a16ce8372fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658A 10524 bytes

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