Malicious PDF — malware analysis report

Static analysis result for SHA-256 45368cce2c98859d…

MALICIOUS

PDF

41.6 KB Created: 2020-08-29 10:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faf80a901f48a44d734b1cbbd496c098 SHA-1: 73ccbcf08add439412e726ca9d95bc3441be8248 SHA-256: 45368cce2c98859dc8e47cb514a6f13bcd7d6b48e6471d23eba6d65b7e0951f8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends

The PDF file was flagged as malicious by a machine learning classifier and contains a large number of embedded external links. One of these links, 'https://ttraff.cc/wix?keyword=tez+sunumu+nas%25C4%25B1l+yap%25C4%25B1l%25C4%25B1r', points to known malicious redirector infrastructure. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through numerous seemingly benign links.

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.cc/wix?keyword=tez+sunumu+nas%25C4%25B1l+yap%25C4%25B1l%25C4%25B1r
    • https://cdn.shopify.com/s/files/1/0434/7474/7556/files/batwoman_comics.pdf
    • https://cdn.shopify.com/s/files/1/0432/8695/4140/files/2074453862.pdf
    • https://cdn.shopify.com/s/files/1/0436/6611/2662/files/37425732935.pdf
    • https://cdn.shopify.com/s/files/1/0439/7904/7070/files/blue_cross_medicare_advantage_provider_dispute_form.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce3a433c7964429c889da22b82d5d1e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fae5cbdc5d6457eb89f4b3720b79149.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1eb81697ff347718ec98a3c8ebf3ed8.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf8204b084274036b0933a571710e5af.pdf
    • https://cdn.shopify.com/s/files/1/0434/6701/4297/files/grievance_registration_form.pdf
    • https://cdn.shopify.com/s/files/1/0462/6789/1861/files/57578151250.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/25817888180.pdf
    • https://cdn.shopify.com/s/files/1/0437/7991/5937/files/97094577304.pdf
    • https://cdn.shopify.com/s/files/1/0428/4930/4742/files/35340065597.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/69822830421.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0543/files/kavadamogisa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/calf_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/biostatistics_journal.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/61631732146.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_off000062b7.bin
b7d84a91b928d5866d66fc29dc09aef92111281d3ed93cc057d6b10062c13574		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B7 5096 bytes
font_01_sfnt_off00007400.bin
afa03bb52bbf3e6c4c6c30918bb77ab215a8e6ec929ccf35c371621f68a54a64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7400 11368 bytes

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