Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2389ffb50be80c…

MALICIOUS

PDF

62.8 KB Created: 2020-08-31 03:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5a1258f81b48214e5ec8b90a325e3c7 SHA-1: 195890174a7b5d2dd3b8d12f270fc2b3921be6c5 SHA-256: 7c2389ffb50be80ce24d8ff1a91ec4aa1dd87489e30dcf2323d9188aef3a4808
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=dragon+age+inquisition+hissing+wastes+merchant'. This URL is likely used to direct users to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document body and metadata confirm the presence of the malicious URL.

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=dragon+age+inquisition+hissing+wastes+merchant
    • https://static.usrfiles.com/ugd/b8c837_2127aa53c9f34d248654fed367439231.pdf
    • https://static.usrfiles.com/ugd/8c0e65_201816a023ca457a9b41d9f655ea4499.pdf
    • https://static.usrfiles.com/ugd/affaa6_d05ec5b93be44692adec6e3805b0a716.pdf
    • https://static.usrfiles.com/ugd/b8c837_70961a14e05f4d12a2d9443d7faf2da3.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_b4075297420c4f52a16507238cc13fbd.pdf
    • https://static.usrfiles.com/ugd/ca32a8_9c13acd5259640fe8c7e12a5044ef3f1.pdf
    • https://static.usrfiles.com/ugd/ea2f88_0650249cc2db4834aaf1329f1d2fe8b5.pdf
    • https://static.usrfiles.com/ugd/cc14e4_c870ccd11fc1423b9ea7cdf721b40248.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/wojurexu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/tagoripezunodumagoxade.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/merabifovusumok.pdf
    • https://cdn.shopify.com/s/files/1/0431/5942/1092/files/nefonumerosexosi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/chemistry_final_exam_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0292/9047/files/teledidikub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24370467333.pdf
    • https://cdn.shopify.com/s/files/1/0448/3471/7858/files/damitopolojotanoxe.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_off0000b024.bin
5f098dea33362dab96a5c10b4263fdf8fb3c265f18bf8b814d76e6a93bfafdf3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB024 5396 bytes
font_01_sfnt_off0000c263.bin
e19770a3545d4aee11fde39561682ab04abe5368a0bbb33f29fb25c70cf3ba59
pdf-font-stream PDF embedded font (sfnt) at offset 0xC263 13588 bytes