Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae6edf5ee8089af…

MALICIOUS

PDF

43.9 KB Created: 2020-08-21 02:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c3d7ee7a9254d4c8887d3e2e5c2e5c3 SHA-1: 44087c3c47be2e317baceccb50efb5346120da50 SHA-256: 5ae6edf5ee8089afe49a2a443c63e0591330a2b4c441501a65b58c0d12ceab20
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to external resources, including a known malicious redirector. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into a fraudulent scheme. The primary malicious URL identified is a redirector, suggesting the document's purpose is to lead users to potentially harmful sites.

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.cc/pify?keyword=zero+acceptance+number+sampling+plans+pdf
    • http://files.nsuasda.org/uploads/1/3/1/4/131406811/de6ea517162.pdf
    • http://files.artdwellers.com/uploads/1/3/1/4/131406369/jerusakesiridaruta.pdf
    • http://xulin.jacquelineabelson.com/uploads/1/3/1/3/131380344/vawukolu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4853/4167/files/ccna_wireless_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/trigonometry_lial.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/51240398854.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46456123156.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/jukatinosovigoxigedoduret.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/fanesakiduji.pdf
    • https://cdn.shopify.com/s/files/1/0448/4576/0669/files/liwagira.pdf
    • https://cdn.shopify.com/s/files/1/0434/1520/8098/files/how_to_calculate_time_complexity_of_algorithms.pdf
    • https://cdn.shopify.com/s/files/1/0440/3032/8997/files/4532301990.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/pressure_booster_pump.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/operation_management_russell_and_taylor.pdf
    • https://cdn.shopify.com/s/files/1/0434/4637/0471/files/pudedibapimusujup.pdf
    • https://cdn.shopify.com/s/files/1/0436/1807/4786/files/76232394872.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_off00006ade.bin
1c69e6274f43de0de4a728bec1c775d8a6bf280e534d0cd99b1814e064421800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADE 5572 bytes
font_01_sfnt_off00007db5.bin
a5de3bfe1461e645153bb997c622acd75713e3466d50de1adb801fff6a9ad7f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB5 10872 bytes

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