Malicious PDF — malware analysis report

Static analysis result for SHA-256 845262326806a90e…

MALICIOUS

PDF

40.3 KB Created: 2020-08-22 04:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a6e7a83735f51254f25e391af6c5a19 SHA-1: 1c17eb9167eb92fab705deca85414ca477f54bc9 SHA-256: 845262326806a90e9f218def72a4803300500f30cb8b352e066f8f1bef87b04e
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.com/pify?keyword=chamma+chamma+song++by+djjohal
    • http://newegoj.traditionalreikicanada.com/uploads/1/3/0/9/130969761/e889cac.pdf
    • http://files.katrinamitten.com/uploads/1/3/1/8/131871698/jagifojipeponidojux.pdf
    • http://rerut.traceyknapp.com/uploads/1/3/0/7/130776132/6182988.pdf
    • http://setedasas.ginetteandmichaeladopt.com/uploads/1/3/2/3/132303108/zenud_bonudozoki.pdf
    • http://dupovo.spikemclarrity.com/uploads/1/3/0/7/130738948/muxujerimimenoga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/gipobibixanixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/tratamiento_del_cancer_gastrico.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/alfabeto_en_ingles_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0444/6945/2967/files/classification_report_sklearn.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikidewutuxazumal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/77289078024.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/17329419412.pdf
    • https://cdn.shopify.com/s/files/1/0431/8507/8423/files/bisodakasaluvexusojaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6249/files/vidmate_uptodown_er.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/68328167161.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_off00005315.bin
5422a08949a6a9e6a1a35a79049ddc8893e6f5e1874687f4211a269c2f72bea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5315 5480 bytes
font_01_sfnt_off0000659d.bin
8cca2b78064736d975e4223903420b9b5a1e0acc89e89b6fa90f008a3a535cda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659D 15076 bytes

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