Malicious PDF — malware analysis report

Static analysis result for SHA-256 07040700d5fb6948…

MALICIOUS

PDF

53.1 KB Created: 2020-09-01 19:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 331f6b95dd3f5a385c661aeb5b3f297f SHA-1: 348ba1c8280c2739d6462c6b19d6153b18accb2b SHA-256: 07040700d5fb69482ee4da063d1dbde38c1f2931aa1710216cfe6d14fbf324ad
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to direct users to a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the primary URL leads to known malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic confirms the presence of numerous external links, many of which are SEO-optimized PDFs, suggesting an attempt to obscure the malicious destination. No scripts were extracted from this sample.

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=mtg+khans+of+tarkir+draft+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0462/4475/7655/files/raduzosugivulozitofibebu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2752/1948/files/9191746966.pdf
    • https://cdn.shopify.com/s/files/1/0464/6676/0856/files/crossword_puzzle_answer_pageant.pdf
    • https://cdn.shopify.com/s/files/1/0458/0130/8326/files/jadasofotinuze.pdf
    • https://cdn.shopify.com/s/files/1/0438/9430/9019/files/galina_reproduccion_animal.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/rebobadexufumefinarexozog.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2261/files/autocad_2020_book_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2594/8072/files/the_nullification_crisis_student_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/68406368156.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/sentence_fragments_worksheet_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/fosajumerepotufekag.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/right_to_equality_article_14_to_18.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/files/tinow.pdf
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/gopunefa.pdf
    • https://cdn.shopify.com/s/files/1/0430/1779/7785/files/95269894223.pdf
    • https://cdn.shopify.com/s/files/1/0433/4944/2713/files/mubufuvojumokenefibojixul.pdf
    • https://cdn.shopify.com/s/files/1/0432/0795/0495/files/fugenufu.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_off0000921f.bin
33d5c7e44f41ca3adf6a29d586d320bea5ef4fb14dbd90b7b31fcf6c43c5904d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x921F 5208 bytes
font_01_sfnt_off0000a3e0.bin
0024cb0debc81343d16dfc5d5c316bbf42279cd902f6d74a0e7b1cc7d8f18171		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E0 10384 bytes

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