Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0d87099d56cda3…

MALICIOUS

PDF

51.8 KB Created: 2020-09-02 22:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8225192eaff28922d1ff7bf2cf0f974e SHA-1: 70f6409553320b59c55b63dd8ac1b60ce1212117 SHA-256: 0b0d87099d56cda361b4f2f826304c1f34536c18dd16c8d6bd394c6467743e4a
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One of the primary links directs to a malicious redirector URL, 'https://ttraff.ru/wix?keyword=fate+extra+guide+psp', which is likely intended to lead users to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link farm attack pattern.

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/wix?keyword=fate+extra+guide+psp
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0604/2023/files/kenmore_600_series_dryer.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/pojukuwemonizuxiwobejimuf.pdf
    • https://cdn.shopify.com/s/files/1/0444/7014/1095/files/41887435205.pdf
    • https://cdn.shopify.com/s/files/1/0436/1335/6189/files/55218907631.pdf
    • https://cdn.shopify.com/s/files/1/0438/6534/2117/files/curriculum_vitae_format_for_nurses.pdf
    • https://cdn.shopify.com/s/files/1/0437/4115/1386/files/3426617054.pdf
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/fugefanobeveni.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/bootstrap_icon_css.pdf
    • https://static.usrfiles.com/ugd/7198c1_fc6a8292e6dd41208152932b7ee47104.pdf
    • https://static.usrfiles.com/ugd/0c4177_9843123a4af949998b922dd210d9bc56.pdf
    • https://static.usrfiles.com/ugd/f5892c_2232402e99504186b2f61964313a0e89.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/fluent_in_3_months_benny_lewis_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0482/0631/files/votop.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/proform_cardio_hiit_trainer.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_off000074aa.bin
9cd166dba68da85bbb479d815eb8e09a294a57b33810d1fd8a023fabb9772bb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AA 4784 bytes
font_01_sfnt_off0000850a.bin
023d08c83b818469c3643628deb87abf3384688ae0adbedd4d20f809e462803f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x850A 14628 bytes
font_02_sfnt_off0000b27e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB27E 4324 bytes

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