Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b54243f0190b55…

MALICIOUS

PDF

54.8 KB Created: 2020-08-31 08:39:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31dd2cb99e87413688bd667ed863cb3b SHA-1: c4850559ae89da9eab1aadcf043c51c074e63f64 SHA-256: 27b54243f0190b55ff65f55506572f67eea9b69bde97278caed205c1c80b496b
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, characteristic of a link farm, with 24 links pointing to PDF files hosted on Shopify. One of these links, https://ttraff.cc/wix?keyword=daiana+guspero+edad+de+la, is identified as a known malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, likely for further exploitation or credential harvesting.

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.cc/wix?keyword=daiana+guspero+edad+de+la
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/ga_mandated_reporter_law.pdf
    • https://cdn.shopify.com/s/files/1/0431/1751/0818/files/ribexopusilulatenanuse.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/anaerobic_respiration_notes.pdf
    • https://cdn.shopify.com/s/files/1/0439/4863/8363/files/luvomojixisotuwiwavek.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca6fec6fff4a4f048527095210d21361.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7980/files/vaxok.pdf
    • https://cdn.shopify.com/s/files/1/0431/1072/7842/files/xinawulonaxogunanidijosir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/brain_meme_template_5.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/online_dxf_viewer.pdf
    • https://cdn.shopify.com/s/files/1/0433/6497/4742/files/bopuwexuxoboxixevewezawog.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/data_engineer_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1420/9186/files/54794751807.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_off00009839.bin
ab99e8b45a84d9c5d0440ab74ca53c873cd9599b806918ac194130d4bebdbdd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x9839 5124 bytes
font_01_sfnt_off0000a9b9.bin
46a78c2f2c409e2882cd89fcd23dfeddca01dffc28b2ca7b2c15c5eb8f348d7a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B9 11384 bytes