Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e4b651d1253b07…

MALICIOUS

PDF

41.6 KB Created: 2020-08-03 20:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d993ed103d9429461fdb0859d5a9ab0 SHA-1: 17aa85510ca33df1659e8dff61ce1da2b5285e6c SHA-256: 17e4b651d1253b07abd8654249a7cc9e7c4c93f982461bcf96ed1026dec117c6
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at `https://ttraff.com/pify?keyword=enumeration+of+microorganisms+pdf`. This suggests the document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous links points to a link-farming or redirection 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.com/pify?keyword=enumeration+of+microorganisms+pdf
    • http://files.drakecreekkennels.com/uploads/1/3/1/3/131378852/mopiz.pdf
    • http://files.nickiburnett.co.uk/uploads/1/3/0/8/130874250/kabutaloz.pdf
    • http://files.simplymeganv.com/uploads/1/3/0/8/130873840/a45f0bd5b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0088/8483/files/gozapiliselobutusomon.pdf
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/82041141354.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/badomoxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9807/files/gexurirepegejokawodawamo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4760/files/57697595541.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/72874673692.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mutim.pdf
    • https://cdn.shopify.com/s/files/1/0431/2494/9153/files/jakavulefovajaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/1419/3311/files/darifozojo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/64319910292.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/xavufuvopasujetegugevo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006523.bin
bb28693537e356c39e8170a59492fb1dd243f40e5fdfa99f4e8e6e626372e565
pdf-font-stream PDF embedded font (sfnt) at offset 0x6523 5400 bytes
font_01_sfnt_off00007770.bin
57f6796dc1dae6e4c82fc8172c19f8caf210b8932d3ee174dca20dfdd065fe8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7770 10168 bytes