Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e1c47bb3c27a49…

MALICIOUS

PDF

47.4 KB Created: 2020-08-13 21:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f23a66db0568921bffa89b39a7410a9b SHA-1: 1c8ab39f8196ea2d4114c212f26036b502397ee3 SHA-256: 80e1c47bb3c27a495243162293c63f2611b18f46980a80e5928609544cc4ff83
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link farm and a malicious redirector, indicating an attempt to lead the user to malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into paying fees for a non-existent prize or parcel. The presence of embedded URLs and the ML classifier's high confidence further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=software+application+developer+information
    • http://files.rossarts.org/uploads/1/3/0/7/130740462/4738178.pdf
    • http://jirov.threegirlsquilting.com/uploads/1/3/2/7/132712380/vurenubesupedibe.pdf
    • http://files.hlhas.com/uploads/1/3/1/4/131483550/wuvoxipepuzan.pdf
    • http://files.studentsagainstnicotine.org/uploads/1/3/0/7/130775092/8923788.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/botw_update_cemu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2620/9175/files/halide_edip_advar_ateten_gmlek.pdf
    • https://cdn.shopify.com/s/files/1/0429/5812/7270/files/96053578641.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/dermatitis_atopik_bayi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/mipegepatetilarik.pdf
    • https://cdn.shopify.com/s/files/1/0435/7256/0031/files/a_monster_calls_chapter_3.pdf
    • https://cdn.shopify.com/s/files/1/0434/3214/9148/files/jopoxodobivog.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/82998661304.pdf
    • https://cdn.shopify.com/s/files/1/0440/6686/5302/files/semowugisinemanejuvaludaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/garawetuwugogexujo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikodizexosuva.pdf
    • https://cdn.shopify.com/s/files/1/0429/7064/4631/files/reduce_resolution_mac.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_off00007948.bin
cafeb057c892202be77a12095c9b157dd17d9266c1dca590a691f8e82ee6fa1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7948 5380 bytes
font_01_sfnt_off00008b8f.bin
b710b9417c35b2b468a716f1bb1db48fe817543a7c58484ba0b2a4ec3fb1fa71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8F 10872 bytes

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