Malicious PDF — malware analysis report

Static analysis result for SHA-256 3692c5e4d9f3fd0c…

MALICIOUS

PDF

48.7 KB Created: 2020-07-27 22:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 141a38cce54d595145c8affbf35adf6c SHA-1: 00180f7e5ce1689fccecbb1a392d2b5c1d54afa6 SHA-256: 3692c5e4d9f3fd0cc91b18b69634145a05168c356fa68c41687cd5f65ff2ee3c
152 Risk Score

Malware Insights

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

This PDF file was identified as malicious due to its inclusion of a link farm, which is a common technique for SEO poisoning and redirecting users to malicious sites. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=best+photo+editing+app+for+android+quora', which is flagged as a malicious redirector. The document also contains numerous other links pointing to PDF files hosted on Shopify, likely part of the link farm strategy.

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=best+photo+editing+app+for+android+quora
    • http://files.bolingbrookhistprescomm.org/uploads/1/3/0/8/130813134/8202208.pdf
    • http://files.michaelbrownslawoffice.com/uploads/1/3/1/4/131406762/xajixolaxexojobegu.pdf
    • http://files.juliettebergmanngrandprix.com/uploads/1/3/0/7/130739895/152871.pdf
    • http://files.yujin200357.com/uploads/1/3/2/7/132740424/murifopufibobi_nabutuno_xawiwuduk_denexofamase.pdf
    • http://files.yu
    • https://cdn.shopify.com/s/files/1/0434/6550/6966/files/64011097557.pdf
    • https://cdn.shopify.com/s/files/1/0437/7598/3778/files/52010819183.pdf
    • https://cdn.shopify.com/s/files/1/0431/5738/9472/files/rilexukegapowabexawok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36281161478.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/sedazukiwudujudalogeruk.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/17879186745.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0554/files/30706821498.pdf
    • https://cdn.shopify.com/s/files/1/0437/7336/2325/files/94513203655.pdf
    • https://cdn.shopify.com/s/files/1/0430/6550/8002/files/merolefoditigisugamuf.pdf
    • https://cdn.shopify.com/s/files/1/0440/1404/3294/files/55532388027.pdf
    • https://cdn.shopify.com/s/files/1/0434/5213/7622/files/renogiguxojozumojiteselag.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/57001336003.pdf
    • https://cdn.shopify.com/s/files/1/0431/6001/0912/files/nawuvitukape.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/88957093864.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_off00007d31.bin
d77e0edbbf5df5949190c61f3715c90ac5dd198472889867ba91985ebd56d6e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D31 5328 bytes
font_01_sfnt_off00008f42.bin
85ddd5111e4e62fbea257ab5a4367e2d71040885112658b3765fda27426aef6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F42 11684 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.