Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3434c24e5e1aac…

MALICIOUS

PDF

35.6 KB Created: 2020-08-27 16:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bf7efc7efef37152dabde4d89e6a042 SHA-1: 25ffbca262e61f8dc47f970b829c34f189fb6a26 SHA-256: 8e3434c24e5e1aacba20432bcc3e9bfdefd185cbe2fb8f577613cda3c2d589a1
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to lure users into clicking on a malicious redirector. The primary malicious URL identified is https://ttraff.club/pify?keyword=pokemon+fire+red+walkthrough+guide+d, which is part of a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to 'Pokemon fire red walkthrough guide d' and the URL, indicating a social engineering lure.

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.club/pify?keyword=pokemon+fire+red+walkthrough+guide+d
    • http://feguro.lexscholarship.org/uploads/1/3/1/4/131406507/natedosimaperusib.pdf
    • http://ponej.ciminerabooks.com/uploads/1/3/2/6/132696398/359087.pdf
    • http://wutaf.roykindelberger.com/uploads/1/3/1/4/131453494/8816787.pdf
    • http://files.lifestarbrokerage.com/uploads/1/3/1/8/131857115/91d64.pdf
    • http://files.bobminney.com/uploads/1/3/0/9/130969218/b37673960.pdf
    • https://cdn.shop
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/movaduleb.pdf
    • https://cdn.shopify.com/s/files/1/0452/4769/2957/files/zupol.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/xiruzatovuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/zabikolewemekuvapa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/el_absolutismo_politico.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/92806140997.pdf
    • https://cdn.shopify.com/s/files/1/0461/8783/9641/files/fogesepipobaxekamaful.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/34529451882.pdf
    • https://cdn.shopify.com/s/files/1/0437/9751/2354/files/bible_app_apk_offline.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/63340089057.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/nujimigefeneb.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/towuzajemibebo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6515/4463/files/arithmetic_sequence_practice_worksheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dfc.bin
b5f2aba89c9090ab312b31e8e177dff81e667391896b496fac677df6993ee241		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DFC 5300 bytes
font_01_sfnt_off00005feb.bin
a7e31afe400c57b3b4b902e1143119ce96b0a0461c925e9b63a97ba9a95a5fac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEB 9784 bytes

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