Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb72f46769413ed6…

MALICIOUS

PDF

38.6 KB Created: 2020-08-13 22:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ceaf80803d04b33f3ac8e5de6ec5686a SHA-1: 06e9d8173fe423873733641bbe0e7562a2208009 SHA-256: cb72f46769413ed6c56ecc7ea8867318bedf87f94b315ef321fd5032610c76a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure related to media content to entice users to click the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=bhojpuri+movie+video+full+hd
    • http://files.eaglemunc.org/uploads/1/3/0/7/130738722/bopuzu_rawibujawak_vusurudifel_pisuloremizubuw.pdf
    • http://files.cabofishdogs.com/uploads/1/3/1/8/131857152/4b6e5d80e38e9.pdf
    • http://wejoned.skyhighservices.com/uploads/1/3/0/8/130814328/bekenazifobuwuji.pdf
    • http://files.whitmorestemclub.org/uploads/1/3/0/9/130969206/nogodoletuti.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdf
    • https://cdn.shopify.com/s/files/1/0440/5824/7320/files/alcoholism_causes_and_effects.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/ischemic_stroke_risk_factors.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/kindle_paperwhite_2020_review.pdf
    • https://cdn.shopify.com/s/files/1/0435/2730/7416/files/paroloxewemisimajodikinij.pdf
    • https://cdn.shopify.com/s/files/1/0433/6454/8762/files/oxford_picture_dictionary_english_thai.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/58100103520.pdf
    • https://cdn.shopify.com/s/files/1/0428/5284/3676/files/murimed.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/fundamentals_of_3d_food_printing_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0449/8400/8862/files/10939168774.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/36845650370.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048e1.bin
2a257f6de1fee237c4af0cbacc48c05200f7ff7500cc56551efba9f23feb6546		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48E1 5076 bytes
font_01_sfnt_off00005a17.bin
eaff0ae238d456d5f98c0620360d6fb842b6fb135dd7623e26a181680e4c9b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A17 10292 bytes
font_02_sfnt_off00007d4c.bin
d5b05bb9a2afa573185c1f6f6b6c69fed6ac118439d5fc5cc1623482f418278b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4C 4304 bytes

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