Malicious PDF — malware analysis report

Static analysis result for SHA-256 0615d058eb0e5af8…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 22:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2abf8eb9dae2c24e9bd2f5a730cb8954 SHA-1: 4c65e5694ee49865232cc2e0e0433fa7bbf502a5 SHA-256: 0615d058eb0e5af84be33d58eb834bde330f9c381df5bd89629d6f944e19b9b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, 'https://ttraff.com/wix?keyword=m+images+download', is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous external PDF links. The ML classifier strongly indicates malicious intent, likely to direct users to a phishing site or download further malware.

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.com/wix?keyword=m+images+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_e10ee5f6e76d49589f79dae644af953f.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_5411e665a9e14cb18243da5a5f682b2d.pdf
    • https://static.usrfiles.com/ugd/b8c837_012066c4100a4d72aa42819e8794940d.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/calpeda_ctm_61_manual.pdf
    • https://cdn.shopify.com/s/files/1/0465/3472/1694/files/memorandum_of_understanding_template_business_relationship.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/69930289819.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8424/files/fusugowelekepuboruzetosa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3574/4673/files/jurnal_tentang_amdal.pdf
    • https://static.usrfiles.com/ugd/865d50_9a609f78112e4f398d16ec66a712c593.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5576bb4e82e473a9abac39e90c939a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_62791ce8fa0e495aa54d24cf65722194.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5457d31b2ec4059a31b98aa8781f0d3.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000657e.bin
55b33f0b220953c5932f225643dea5c3adc6726b3eba79d945ddf3694e1a136f
pdf-font-stream PDF embedded font (sfnt) at offset 0x657E 5144 bytes
font_01_sfnt_off00007705.bin
9f699f341832cd83652698b09e6ab28d868bd6d55a974669792db89f33c8afa0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7705 14752 bytes