Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e20df35b548117…

MALICIOUS

PDF

40.6 KB Created: 2020-08-03 23:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f596d344ba7b366164641058eefc275 SHA-1: 2534cdfbbb99f36f9fce01acc1f8338b4bc226c3 SHA-256: 67e20df35b54811791b0a7feb425c578dc95b00863f9c27dfd3f13c14bf5119b
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, masquerading as a manual for an Apple iPod Shuffle. Analysis reveals that one of these links, https://ttraff.ru/wb?keyword=apple%20mini%20ipod%20shuffle%20manual, points to known malicious redirector infrastructure. The document also exhibits characteristics of a link farm, with many links pointing to external PDF files, some of which are hosted on potentially untrusted domains.

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/wb?keyword=apple%20mini%20ipod%20shuffle%20manual
    • http://degiwer.31quotes.com/uploads/1/3/2/3/132303035/tasaralezuxemur_rudodobo.pdf
    • http://gifalelo.scrapmetalcollection.com/uploads/1/3/0/7/130738779/4717155.pdf
    • http://files.bunkyechohawk.com/uploads/1/3/1/1/131164519/pikunirekem.pdf
    • http://files.electricstormecigs.com/uploads/1/3/1/3/131398204/2338388.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4012/8671/files/vovetofuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2829/9427/files/95259535762.pdf
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/free_depfile_premium.pdf
    • https://cdn.shopify.com/s/files/1/0433/3489/3718/files/nejikamapaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/vunamogatedupe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4436/4710/files/90359533159.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/kesarenututelomot.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/bizane.pdf
    • https://cdn.shopify.com/s/files/1/0439/3736/6184/files/robins_credit_bulletin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81274949660.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7141/files/fml_client_latest_log.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/delizulixabedawopozu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3120/6808/files/48486448211.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/zowoviminojozunesi.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_off000061e9.bin
6ac457da4dd0190cd421fefb9a791515be236da5b4f4585d4652737619fd5906		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E9 5176 bytes
font_01_sfnt_off00007365.bin
464e06575d85a8d68c9225c56c8617b8df7436aba854cb1895a087776454f4d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7365 9964 bytes

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