Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f2ef47c02a7a7f…

MALICIOUS

PDF

54.8 KB Created: 2020-08-21 22:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0222e733632b0b20b3bd4bd883975fd SHA-1: b67ce12d39d67bbcdd1e421c05f48e5317d03716 SHA-256: 04f2ef47c02a7a7f835579ddc86b5d62846f4b7c6c4fc8142e40971c4e36c391
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', disguised within content that appears to be an annual report. It also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links but others are unknown. The ML classifier strongly indicates maliciousness, supporting the conclusion that this document is designed to lure users to a malicious site.

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/pify?keyword=hochtief+ag+annual+report+2010
    • http://files.judiculbertson.net/uploads/1/3/0/7/130740017/mozapabebiw_femunu_fekamibovijelig_pigigurob.pdf
    • http://jerupo.dogsdowntownva.com/uploads/1/3/0/8/130814328/aad85974904.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/nokovesedugasuvixa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/callan_method_book_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/rectangular_prism_volume_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64830269039.pdf
    • https://cdn.shopify.com/s/files/1/0435/5247/3252/files/wibebuxuzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/11199966534.pdf
    • https://cdn.shopify.com/s/files/1/0464/5198/2504/files/nezogigeser.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/alfie_kohn_beyond_discipline.pdf
    • https://cdn.shopify.com/s/files/1/0435/8412/7135/files/excel_cheat_sheet_2017.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/xodawajulusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/binoculars_icon_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xifadek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotedijulukamani.pdf
    • https://cdn.shopify.com/s/files/1/0428/0107/0247/files/rogimaxivove.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_off000097ba.bin
e4ed70dddfc6cae4c72b07e425fb7c8d4ecb50f98c1d86d70f13ff2c83d13ccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97BA 5384 bytes
font_01_sfnt_off0000aa01.bin
fca067f9e98e87ab60b8a5342b48bfbfa7f34b7eeb1aba6ba49398420a2d5785		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA01 10444 bytes

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