Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbdba0a4e0ef2dd…

MALICIOUS

PDF

34.6 KB Created: 2020-08-02 15:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd7dc08341a8d42334c53030d2818f2b SHA-1: 66fa58476c157c81790928c3151a8da6442f99f5 SHA-256: ddbdba0a4e0ef2dd74e83eddc4ec190f07fbfbe55c6ebda4425bd7abbd8b2019
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=pinoy+tambayan+123', which is also listed as a malicious redirector. Additionally, the PDF contains a large number of embedded links, many pointing to shopify.com, which is flagged as a link farm. This suggests the document is part of a phishing or scam campaign designed to redirect users to malicious sites.

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=pinoy+tambayan+123
    • http://files.hopeafterlossorganization.net/uploads/1/3/1/0/131070166/2393059.pdf
    • http://files.epvballoons.com/uploads/1/3/0/7/130739309/radotonu-jedolofi-rixupojulir.pdf
    • http://files.edibledreamworks.com/uploads/1/3/0/7/130776386/c989d.pdf
    • http://files.murpheeandsugar.org/uploads/1/3/1/4/131436978/kakekef-lofejonusara-lusosopo.pdf
    • http://files.ambleandwarkworthrotary.org/uploads/1/3/1/8/131856285/bokivolifaruro-fipelu-tolenemosa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/san_luis_pass_fishing_reports.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5031/files/82419773190.pdf
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/22280930699.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/19694392592.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/53147487516.pdf
    • https://cdn.shopify.com/s/files/1/0433/9004/2268/files/wiluvavunixemobera.pdf
    • https://cdn.shopify.com/s/files/1/0436/4409/2566/files/711580271.pdf
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/buxewipubibowujasolafu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/sufon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5483/3557/files/wikonopimanuxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3674/files/1177002456.pdf
    • https://cdn.shopify.com/s/files/1/0438/9309/6600/files/tozizuligufizadigaxesap.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_off00004aaa.bin
d341ab7560b80e85351b9313c76cb9d7b0f2c5bce1f85ad05eba9fa21ddaba79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AAA 5116 bytes
font_01_sfnt_off00005c1c.bin
ee297d87ff13b8f7bb75d017669f46f3ede29dd9aa82689a98b5b303cece343c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1C 9832 bytes

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