Malicious PDF — malware analysis report

Static analysis result for SHA-256 058b920b94957dab…

MALICIOUS

PDF

42.5 KB Created: 2020-08-10 13:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f92472118a51920330b7e97b727ec015 SHA-1: 59f692a7db98a82e2e9fe42a2e79e8b5e366f04a SHA-256: 058b920b94957dab030d93af5ba98e26d68f774c911d3559a269814af68e3753
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, includes the primary malicious URL and a title suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content.

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=bugaboo+frog+instruction+manual+pdf
    • http://files.lmcphoto.space/uploads/1/3/1/4/131453215/vopegurilor.pdf
    • http://jojigup.terisweetgarden.com/uploads/1/3/1/4/131453540/tatajazusu-fufowa-gutuzup.pdf
    • http://paloxi.dogologyct.com/uploads/1/3/1/0/131070993/daxidibasu.pdf
    • http://files.jjsdka.org/uploads/1/3/0/9/130969819/98a098cf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/21803407052.pdf
    • https://cdn.shopify.com/s/files/1/0433/0743/4142/files/duvalodusenuwogigax.pdf
    • https://cdn.shopify.com/s/files/1/0440/2751/0934/files/winerope.pdf
    • https://cdn.shopify.com/s/files/1/0444/2321/7318/files/borislav_jovic.pdf
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/disineme.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/renomavomufiguzuro.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/33986021850.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2513/files/beremomafepidawesusokuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1411/files/operador_de_calderas_industriales.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/runuwadobona.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/5257346609.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/adobe_reader_for_mac_update.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/boy_erased_livro_portugues_download_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/4619/9711/files/33284694110.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_off00006801.bin
acb02366695c3e129f625ed68bb7b034dce2ef6a7f2fe67fee9ee515ea4120ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6801 5664 bytes
font_01_sfnt_off00007b20.bin
b9d359a01a0a68c4d31c3a3e61aba2200ebb21b752d25fdc069845ea347749c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B20 9920 bytes

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