Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea59dd1f730e3d1…

MALICIOUS

PDF

43.3 KB Created: 2020-08-31 20:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d013409d54e28dcfc5592c8367692ed3 SHA-1: 2b1d53754a3a82d729abf7137327040e65714739 SHA-256: 5ea59dd1f730e3d15ec0f0a6084ae5c03e6c63cb0f232ecfc77c5d2e887b7482
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs and text that mimic a download link for 'Itunes apple music apk', aiming to trick users into clicking. The primary malicious URL, https://ttraff.ru/wix?keyword=itunes+apple+music+apk, is identified as a redirector to malicious infrastructure. The ML classifier strongly indicates maliciousness, supporting the classification as a phishing 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.ru/wix?keyword=itunes+apple+music+apk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3b7182_79fa599fbe624c39ae507b5d75d53ae1.pdf
    • https://static.usrfiles.com/ugd/9219f8_26c5784895f74a5db498b4a087dd767d.pdf
    • https://static.usrfiles.com/ugd/63d3ad_697ac2d4c2194176b0ecb2fa786c6a24.pdf
    • https://static.usrfiles.com/ugd/e8506d_63315cab71d4475e90e9ba292271308b.pdf
    • https://cdn.shopify.com/s/files/1/0433/2286/7880/files/28063686123.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/formel_anlagendeckungsgrad_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5239/files/kolaxejatewibigexudutexuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/desazipiwiwezusipebip.pdf
    • https://cdn.shopify.com/s/files/1/0440/7292/7384/files/12716095073.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/kabilev.pdf
    • https://cdn.shopify.com/s/files/1/0467/7399/3625/files/25902378624.pdf
    • https://cdn.shopify.com/s/files/1/0439/1629/6360/files/ludovico_ariosto_orlando_furioso.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/xigigasukulafepikepabi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/2039317166.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005703.bin
ff0ae4510f33f4f82186d9f35b93d66175d79226ca4d34a34dec68f9ba9d7f35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5703 4984 bytes
font_01_sfnt_off000067ea.bin
83524cc746c02688d803d94c49ac9b9fc0e9544bafa87e57776729bae13e3605		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EA 10520 bytes
font_02_sfnt_off00008b52.bin
794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B52 16168 bytes

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