Malicious PDF — malware analysis report

Static analysis result for SHA-256 6216c6008454a6b6…

MALICIOUS

PDF

48.1 KB Created: 2020-08-01 10:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8a2305dd968d4216bb450b6e78c3849 SHA-1: 7fc22adf9833806ab49159159b4cd78e30e85e88 SHA-256: 6216c6008454a6b6000798ef2e0421cf4aef50bd62cef95fa1eb155c1d5ea851
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with 18 external PDF links, likely intended to manipulate search engine rankings or distribute malicious content. One of the links, 'https://ttraff.ru/pify?keyword=super+mario+comba', is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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=super+mario+comba
    • http://files.xrchurch.shop/uploads/1/3/1/8/131856333/4903138.pdf
    • http://files.cicadabridal.com/uploads/1/3/1/1/131163578/6308168.pdf
    • http://files.anyakunze.com/uploads/1/3/1/3/131381614/rewobifoto_satudofube_tupokulevikin.pdf
    • http://files.tbenthusiast.shop/uploads/1/3/1/3/131383998/tomatasuje.pdf
    • http://files.northoftime.com/uploads/1/3/1/4/131453902/154353dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/84436585609.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/nys_math_test_2017_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/73382033309.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/katuvoputobisolonidimu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/wuxujovibilasinaxufirib.pdf
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/98272738994.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/zaramo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/divadajirukisebujiputila.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8949/files/66891415612.pdf
    • https://cdn.shopify.com/s/files/1/0437/2715/9448/files/nagodezuvefijob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/15435480679.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/70060163497.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/dixurefelexas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071f3.bin
1324ff595eb754cbdfab4e060a06f692414aebbb359e73ef5498f4dba8a89771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F3 4808 bytes
font_01_sfnt_off00008237.bin
d24c8a8757d4c15f376465c69e7113b9eadeaeaba76e86e6b0bdcaa15e5e1d77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8237 10288 bytes
font_02_sfnt_off0000a56b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA56B 4324 bytes

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