Malicious PDF — malware analysis report

Static analysis result for SHA-256 706ce5228f94ee59…

MALICIOUS

PDF

54.5 KB Created: 2020-07-29 14:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 816ed783e1caf66375257ccf1f2f9de0 SHA-1: 101d6c1bc71e6d46e693ceba41db421c5780d691 SHA-256: 706ce5228f94ee59dfdf30c4a3ff0f20a77add7d1f675591dcee707b9512ae0b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm designed to redirect users to external content. One of the primary URLs, 'https://ttraff.cc/pify?keyword=canzoniere+napoletano+accordi+pdf', is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious sites, likely delivered via spearphishing.

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/pify?keyword=canzoniere+napoletano+accordi+pdf
    • http://files.echostage.info/uploads/1/3/1/6/131606674/nuzod-vigebeliwa.pdf
    • http://files.artsyus.com/uploads/1/3/2/7/132710748/8741111.pdf
    • http://files.aratikreibich.com/uploads/1/3/1/6/131637853/6d9ab36b811cb9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/tomamojibezisemipusunopav.pdf
    • https://cdn.shopify.com/s/files/1/0436/0224/7838/files/35604305012.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0434/1042/3960/files/jipolisagiseg.pdf
    • https://cdn.shopify.com/s/files/1/0433/1778/8830/files/gofajalirakanowigog.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/72494309548.pdf
    • https://cdn.shopify.com/s/files/1/0428/7135/7596/files/85350930050.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/dolowujov.pdf
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/nujovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/biponadokut.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0072/files/51597258761.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_off00009601.bin
87a2d928ac87305b41d4da1d6cd31b5d4b6aed1f666b97eed284688d22f7944b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9601 4832 bytes
font_01_sfnt_off0000a683.bin
adaff79d63781837f89333f85f70ce3c6643e079fb854fdb18d51d03cf55fd39
pdf-font-stream PDF embedded font (sfnt) at offset 0xA683 11216 bytes