Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30ba8bebae1ec75…

MALICIOUS

PDF

39.1 KB Created: 2020-08-17 13:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37f339d72c3e44300a4776207ab779fb SHA-1: f2ebaad19d059498f3f02afc47ff6614264c8b1b SHA-256: d30ba8bebae1ec75ed471b626d5a89ab679ccb239a583682481a276f56e5c264
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains commonly used for SEO link farms and redirectors. The primary malicious URL identified is https://ttraff.com/pify?keyword=2019+calendar+november+pdf, which is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be corrupted or heavily encoded, but the presence of URLs and the heuristic firings strongly suggest a phishing or redirection attempt.

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=2019+calendar+november+pdf
    • http://files.dhsdrama.com/uploads/1/3/0/7/130775413/xawikutonozifa-nosinixuvexetu-befulewubem.pdf
    • http://files.cea-alaska.org/uploads/1/3/0/7/130775055/6293324.pdf
    • http://files.onyxbeautystudio.com/uploads/1/3/2/6/132681199/7234459.pdf
    • http://files.gammaetaepsilondkg.com/uploads/1/3/1/6/131606733/a5e48c0f9eeb47e.pdf
    • http://files.aldersgatebutte.org/uploads/1/3/1/1/131163740/jemeveloreki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8357326041.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0431/0630/4166/files/91827650628.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/puwutedefetu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6667/0745/files/potassium_bromate_in_bread.pdf
    • https://cdn.shopify.com/s/files/1/0435/9585/8088/files/veteduxotaxemawesidanaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1410/files/61084953388.pdf
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/50527311209.pdf
    • https://cdn.shopify.com/s/files/1/0449/9347/8814/files/6589270328.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_off00005961.bin
d56a1ba0bdc78790f72283b29d8087d864935b73dc03a4b70a2143b1c6fcb472
pdf-font-stream PDF embedded font (sfnt) at offset 0x5961 5708 bytes
font_01_sfnt_off00006ca5.bin
c4938bc12380b99cdbfee4551a7e103af9d0433eeb139e58674bfedf9dbe1d5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA5 10412 bytes