Malicious PDF — malware analysis report

Static analysis result for SHA-256 027be403b5a18836…

MALICIOUS

PDF

44.7 KB Created: 2020-08-14 07:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06ec4d6ea8ab98956c0e894b826c8d8c SHA-1: daea19b46ebf9b528d27624670e2c07da622030e SHA-256: 027be403b5a1883653b66419852f9af2f9115c8d4db36da2bf3ca3884032b2b5
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 a redirector link to 'ttraff.ru'. The document body, though heavily obfuscated, contains this same URL, suggesting an attempt to lure users to a malicious site. The ML classifier strongly indicates maliciousness, and the presence of multiple links points towards a link farm or phishing 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.ru/pify?keyword=intermolecular+forces+and+boiling+point+worksheet
    • http://remirepik.c3pojhmi.com/uploads/1/3/1/3/131381006/6b6f72c627a.pdf
    • http://bitemuba.jesspurtellyoga.com/uploads/1/3/1/3/131380183/kugapipegine.pdf
    • http://files.academyjuniors.net/uploads/1/3/2/6/132696233/rowebemuxo-bijejowapoja.pdf
    • http://tejujurev.extremeimprov.co.uk/uploads/1/3/1/1/131163908/1659479.pdf
    • http://budoz.antigonekoutalieri.com/uploads/1/3/1/6/131636948/zevus-donivus-lupeze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7157/8024/files/masofarurujiwosiko.pdf
    • https://cdn.shopify.com/s/files/1/0431/5037/7126/files/spoken_english_conversation_through_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0438/5207/1074/files/sotafunutivodinikokojuni.pdf
    • https://cdn.shopify.com/s/files/1/0439/1878/6728/files/10796973092.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2776/files/94460201842.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7900/files/68294901796.pdf
    • https://cdn.shopify.com/s/files/1/0454/0645/3928/files/causal_inference_in_statistics_a_primer_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36920421444.pdf
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/reinforced_brick_masonry.pdf
    • https://cdn.shopify.com/s/files/1/0449/8512/2984/files/kangen_water_benefits.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_off00006e90.bin
ccae3239ed6dff5106c11347c0a56dc45b7ae8ba47a0d5bd59c30f575ba16bf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 5804 bytes
font_01_sfnt_off00008225.bin
7278c604c6d7f83daa345cad7fde4950b9862b5ddd431c8432488f779b073954		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8225 10364 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.