Malicious PDF — malware analysis report

Static analysis result for SHA-256 66413c217d07d00c…

MALICIOUS

PDF

109.0 KB Created: 2020-08-14 04:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86e2a1b369d09ff73257a94ca9037038 SHA-1: c458b37f243bceb0c8b736df587557e95ce59a77 SHA-256: 66413c217d07d00c17c39459ad45e2411d5f6b4796b518b91d6ce7c1905ab357
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 link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=cielo+lio+2+manual'. The document body, though heavily obfuscated, contains this URL, suggesting a phishing or scam attempt. The presence of a large number of external links also indicates a link farm, a common tactic for SEO manipulation or distributing malicious content.

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=cielo+lio+2+manual
    • http://files.traderhsm.com/uploads/1/3/1/8/131856290/gurotuxalusav.pdf
    • http://files.sanssacredcircle.com/uploads/1/3/1/0/131071019/d5cf8ceb5a8bc.pdf
    • http://files.tippwheelers.net/uploads/1/3/2/6/132696210/5308083.pdf
    • http://files.dunrovenfarms.com/uploads/1/3/2/7/132740805/4416714.pdf
    • http://bubak.hobanwellness.org/uploads/1/3/0/8/130874493/dae32b72e6dc2ef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nelafujadodejofit.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/92258450582.pdf
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/kamuwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/diagnostic_service_host.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/6514143488.pdf
    • https://cdn.shopify.com/s/files/1/0437/2260/4695/files/agenda_2020_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/tutorial_java_para_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/catalogo_bujias_ngk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9373/8143/files/side_effects_of_antiepileptic_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0437/5629/0206/files/tlcharger_cours_d_anglais_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0432/7948/3044/files/jimogulejotabepami.pdf
    • https://cdn.shopify.com/s/files/1/0439/0689/1931/files/cicely_berry_drill.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4687/files/64047976859.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_off00015fe6.bin
761546153ed360ae069b5e70008ea5922fbd451b092258f2764dfc318b5d6f01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FE6 4592 bytes
font_01_sfnt_off00016f64.bin
92996b5e9e67c954183321e5e483ad3dd4dc17a429ba9f1bb52c33f4e56790a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F64 17456 bytes

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