Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a322d56131eeaf…

MALICIOUS

PDF

35.7 KB Created: 2020-08-19 13:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 126fca58a676572c1b939efa5f430c5d SHA-1: 44e1d8a62e0b2f4130b90dbf38e182e6b4b7649f SHA-256: 72a322d56131eeaf37c7d1fd07b58765cdaea34e627cdbf764cb04e5b87c3721
154 Risk Score

Malware Insights

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

This PDF document contains a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=anbe+peranbe+song++kuttyweb'. It also exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on Shopify. The primary intent appears to be directing users to malicious infrastructure, likely for a phishing or scam campaign, leveraging the embedded links as a lure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/pify?keyword=anbe+peranbe+song++kuttyweb
    • http://files.bpwkw.ca/uploads/1/3/0/7/130739348/temubes_newinijil.pdf
    • http://files.denniscosta.com/uploads/1/3/1/4/131453989/dc1a65d622.pdf
    • http://files.irelandforme.com/uploads/1/3/0/7/130738769/pajive.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8621/6352/files/funoloboweketira.pdf
    • https://cdn.shopify.com/s/files/1/0428/6011/8175/files/motherboard_asrock_g41m_vs3_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/9710/2238/files/bar_chart_questions_ks3.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/89913420952.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/milumiwirarebadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/43560794469.pdf
    • https://cdn.shopify.com/s/files/1/0434/7694/3000/files/18960287.pdf
    • https://cdn.shopify.com/s/files/1/0435/8006/3903/files/age_of_empires_3_cheats_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6478/6086/files/lokidijowe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/caaspp_practice_test_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0438/9994/5112/files/interior_design_dictionary_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3988/files/31048783962.pdf
    • https://cdn.shopify.com/s/files/1/0437/8833/7313/files/kisejomusopezufovezitut.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_off00004df8.bin
2cd250030981f035e1c574465eb818cd10fc0a4041b1e04c1b4fdcfad3d04a6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF8 5340 bytes
font_01_sfnt_off00006043.bin
73c5d2cfd5cfd58d54e72fb5de53b305a7ead776f0aa386cf4d29339d4b25314		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6043 9908 bytes

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