Malicious PDF — malware analysis report

Static analysis result for SHA-256 93922e9ea55a041b…

MALICIOUS

PDF

41.3 KB Created: 2020-09-09 05:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ca23e26e8398107ba184452f0ad5297 SHA-1: b29b4241fac4756827cf31e5e537aee8829ebb03 SHA-256: 93922e9ea55a041bd1a0263d1ba883181885bfa4887aa4cc4c30d7b0b126963a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at "https://ttraff.club/wix?keyword=haunted+house+waiver+form". The document body, though partially corrupted, suggests a lure related to a "haunted house waiver form". The presence of a large number of external PDF links, many hosted on static.usrfiles.com, indicates a link farm designed to distribute traffic to malicious sites.

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=haunted+house+waiver+form
    • https://static.usrfiles.com/ugd/2d1648_0bc27b876f654e54b895bf7dc821c4f4.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_7872d1ef4722492bb63f300226dc06ec.pdf
    • https://static.usrfiles.com/ugd/87d215_c7955490979d48ada8873fe553a9a085.pdf
    • https://static.usrfiles.com/ugd/0c41e7_b093077dd6d043e79c7748655c4a082d.pdf
    • https://cdn.shopify.com/s/files/1/0428/2132/0870/files/bcom_1st_year_financial_accounting_n.pdf
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/29132077060.pdf
    • https://cdn.shopify.com/s/files/1/0444/6437/3927/files/88288734311.pdf
    • https://cdn.shopify.com/s/files/1/0438/7920/2984/files/nedidexis.pdf
    • https://static.usrfiles.com/ugd/4117a9_b6cd0aa7b630406fae912517dc92901b.pdf
    • https://static.usrfiles.com/ugd/e4ee87_be8b9b68befa4209b6d8471806c94ec4.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006461.bin
6981582aa18717d3407210a6728d474abae4b5786d52df139b0614afeab6992f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6461 5228 bytes
font_01_sfnt_off00007610.bin
d3f119d8cd88bd796bf7339cab035a69ab30449f439126a630575185054bc222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7610 10272 bytes

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