Malicious PDF — malware analysis report

Static analysis result for SHA-256 0750b6ede70ea3ad…

MALICIOUS

PDF

34.6 KB Created: 2020-08-23 20:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67ed921a553ea358437a75e10ee09248 SHA-1: 0f4e74740f3bb56b2e0f517b5931892be8e3d724 SHA-256: 0750b6ede70ea3adb6be5a31869c810e61cc5b795be71babccb65cd8ea4679be
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or leading users to phishing sites. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute content broadly. The ML classifier also strongly indicates maliciousness.

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=3d+game+maker+apk+offline
    • http://dovep.pluckthemusical.com/uploads/1/3/2/8/132814930/bipisagulu-demuli-xexiwa.pdf
    • http://jiwuj.baseballperformanceinstitute.com/uploads/1/3/0/8/130814397/liwixogokavope.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/gelupokudekoxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/69950579036.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7576/files/preguntas_ser_bachiller_2020_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0439/1727/9400/files/xobavovunonijawufet.pdf
    • https://cdn.shopify.com/s/files/1/0435/4542/8122/files/abundance_book_by_peter_diamandis.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6165/files/dividing_scientific_notation_worksheet_kuta.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/depomunoxoweteveno.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/sexutuxojowoge.pdf
    • https://cdn.shopify.com/s/files/1/0430/9522/8565/files/pagud.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/star_ocean_anamnesis_japanese_apk.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_off00004899.bin
7dbc8d2bf7f73227d4d535fd73c3799823e2fc342c1dc033b3bb196c267cc16f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4899 5316 bytes
font_01_sfnt_off00005a97.bin
3598fe39e5192bd0d5a36c3fbe881d1c7c979466eeaac51b33707121e1f57fbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A97 10360 bytes