Malicious PDF — malware analysis report

Static analysis result for SHA-256 e588ab521750b6c3…

MALICIOUS

PDF

36.6 KB Created: 2020-08-06 11:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f42b738769a939ddb81fa20f4e659df4 SHA-1: 41f20b5cc3833577e203ad8da8f32abf6163bdef SHA-256: e588ab521750b6c3345944b889805292207094594690b863d5f937627bb0b555
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'iatf 16949 pdf download free' and the malicious URL, suggesting a lure to trick users into visiting malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/wb?keyword=iatf%2016949%20pdf%20download%20free
    • http://files.maverickhilldressage.com/uploads/1/3/2/6/132695874/47b35.pdf
    • http://files.varshapremgames.com/uploads/1/3/0/8/130813528/gatib_sawiguver_kemoxo.pdf
    • http://zuleso.sunnypinescommunity.com/uploads/1/3/0/7/130776486/zituz.pdf
    • http://files.dropertytax.com/uploads/1/3/2/7/132740541/lovuwinozuxexajapare.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/bavelomuzizititewesowuzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/3988996411.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9347/files/6sn1123_1aa00_0ea1_reader.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7736/files/sengstaken_blakemore_tube.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/19540884969.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/11923202794.pdf
    • https://cdn.shopify.com/s/files/1/0428/8361/2831/files/88197661999.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81256704061.pdf
    • https://cdn.shopify.com/s/files/1/0438/2975/6066/files/putedotopafozuvixikijoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/8548/7525/files/apprendre_le_franais_pour_dbutant.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/tukuzikijusonisatabuzelam.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/49159743023.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5517/files/series_6_exam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050a3.bin
0cd2d055079e15f2d6b5744a90b2fd2542943459040eb7ea6f574dce4d9bda88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50A3 5336 bytes
font_01_sfnt_off000062f4.bin
583f44d3845667c641a4a8dcfb6efdc9c9ca25b25ba9c5b79350b409abb197bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F4 10092 bytes

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