Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff06b354bf4b7f5e…

MALICIOUS

PDF

50.1 KB Created: 2020-08-30 14:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17049cda097b2267763a4614cadedc5b SHA-1: f2f7f5da3a0656b1a7f44ee13c3878a3b6d8fb8e SHA-256: ff06b354bf4b7f5ec8d3f7cce56d70f101f9088c875292630679018ecba3961e
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, a technique often used to create link farms for SEO manipulation or to distribute malicious content. One of the primary links directs to a known malicious redirector, ttraff.ru, which is disguised with a keyword related to a Ford Focus service manual. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector URL is a high-confidence indicator 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/wix?keyword=2014+ford+focus+factory+service+manu
    • https://static.usrfiles.com/ugd/3e9e83_4681af46e18f46df9ef1b95850319282.pdf
    • https://static.usrfiles.com/ugd/b42fd6_46c97c6897854d97958c42f9b2872339.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f9bac77e7bd439588c58f39a9531f0f.pdf
    • https://static.usrfiles.com/ugd/b4609a_8f9c4b25030e49b286fc63343275f69d.pdf
    • https://static.usrfiles.com/ugd/de65f7_d1bc7c5dd4284875a5cef9f17af6c5d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_6903332262864fe29263e593f599942b.pdf
    • https://static.usrfiles.com/ugd/516793_551f9c4d0ce24ac99567f0a6f2c0514d.pdf
    • https://static.usrfiles.com/ugd/b8c837_30ae01d5f89740e69863cbf96734f654.pdf
    • https://static.usrfiles.com/ugd/b8c837_2cdd7914f6664c0fb4f3b3874868d185.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ca82a74db1141a097d4cc8afc3a5e13.pdf
    • https://static.usrfiles.com/ugd/18f527_55b641d1e9fb4bdb8dd49ed265f70f39.pdf
    • https://static.usrfiles.com/ugd/b8c837_9aa87b3a407b411b992e3fae46b32f23.pdf
    • https://cdn.shopify.com/s/files/1/0436/0863/7602/files/telugu_bajana_patalu_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/63642722824.pdf
    • https://cdn.shopify.com/s/files/1/0432/3426/3199/files/biregunofi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/how_to_compress_a_file.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_off00007bd4.bin
85ccdd1db3c0d90d64697011a704d60b11a0411914f232cb67a8556a292e8d44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD4 5616 bytes
font_01_sfnt_off00008edc.bin
d5e3460f7459de1c8d5d4c2f1f800b937f67f832db2eff6271e6e96b0f2b0d38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EDC 14576 bytes

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