Malicious PDF — malware analysis report

Static analysis result for SHA-256 6525280799f600bc…

MALICIOUS

PDF

35.0 KB Created: 2020-08-15 06:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c887e2b49ea11e39cea39006712544b SHA-1: 2bbf720f5c358dc6571ad354d70c3c5e7030f8af SHA-256: 6525280799f600bc9c7d784a70caa8ed1ede7102a5adc35ee7d917b4f600675b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, 'https://ttraff.ru/pify?keyword=scotsman+guide+logo', is flagged as a known malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious infrastructure, potentially for phishing or malware distribution.

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=scotsman+guide+logo
    • http://files.mary-jomurphy.com/uploads/1/3/0/8/130873830/wojirubesulitugeka.pdf
    • http://files.bullengarookadultriders.com/uploads/1/3/2/6/132681596/fomapofegaro-wopigadazodup-zevevamer-tirexilagenizo.pdf
    • http://files.foodfixations.com/uploads/1/3/1/4/131437402/keruka.pdf
    • http://files.theforest.co.in/uploads/1/3/0/7/130776485/futupitupetonesoko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/88082784876.pdf
    • https://cdn.shopify.com/s/files/1/0437/2171/9959/files/vocabulary_worksheet_6th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0439/1793/4747/files/iluminacion_espiritual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4333/files/kofez.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/36722047620.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/40575907917.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/lerevosusawu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/design_patterns_explained_second_edition.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_off00004b74.bin
a140e4fd6ff4b75711fac530211fbc31b4a405d3c9be8e9379f519a600c4fa3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B74 5264 bytes
font_01_sfnt_off00005d36.bin
174f0bc4f654c6399ccde98c2c2cdd8735212119ac8395b03b4757da40efd31e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D36 10012 bytes