Malicious PDF — malware analysis report

Static analysis result for SHA-256 715418c353fc1664…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 13:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 568feaca86f758597295cc7641f3971d SHA-1: e7bf3a6e7b86f5bdb51c6fdafd35f907de4c6347 SHA-256: 715418c353fc16645b881e22e427ab993ec2ebeea517af5f24893630c31cc8d7
154 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to its function as a link farm, embedding a large number of external links. One of these links, 'https://ttraff.ru/wix?keyword=tabela+ncm+chapa+galvanizada', points to known malicious redirector infrastructure. The document body contains garbled text and embedded URLs, further supporting its malicious nature. The primary attack vector is likely spearphishing, with the embedded links designed to lure users 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.ru/wix?keyword=tabela+ncm+chapa+galvanizada
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/gta_4_requirements.pdf
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/dibabitewojatakot.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/82365171426.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0813/files/balboa_theater_seating_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2529/files/possessive_case_of_nouns.pdf
    • https://cdn.shopify.com/s/files/1/0432/6653/9673/files/block_site_app.pdf
    • https://cdn.shopify.com/s/files/1/0435/1941/0335/files/69008659256.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/wumamuxerokibudof.pdf
    • https://cdn.shopify.com/s/files/1/0434/4617/3852/files/git_set_upstream_branch.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/cube_world_ninja_guide.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5b202edd1044a25b199b1d41445b8c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_3853946d01894217bf58c5ea9bbbd60f.pdf
    • https://static.usrfiles.com/ugd/c6ac46_0d241c4b5a0f4be6884b878ba6cfcc0f.pdf
    • https://static.usrfiles.com/ugd/6da380_acd1c55bfc0b46d4b2bc09a5be39806b.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_off00005ea7.bin
ae4c09537d628cc899e10569082990b113fb7d34a68b3d948037e55cc62904c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA7 5412 bytes
font_01_sfnt_off000070ec.bin
d305524e1a27a990667f920b1735f14ea0eaa3460858f04e523cd813299b98f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70EC 2004 bytes
font_02_sfnt_off00007a82.bin
9a0ea9bcc99dbc4b0a39476f7c59db1b6b88b599a9a0e70a8cbc46249537a08e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A82 13160 bytes

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