Malicious PDF — malware analysis report

Static analysis result for SHA-256 701f23fc3695dc5e…

MALICIOUS

PDF

38.2 KB Created: 2020-08-12 14:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 910917459c37a22b3640053cde82381f SHA-1: d7d9133b7494aed55038d717bb0a067e28fe1d9d SHA-256: 701f23fc3695dc5e784ff7fea29dd1302f730a9b94836699e91d48ac61bbb0f7
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded URLs, including one identified as a malicious redirector at 'https://ttraff.cc/wb?keyword=ragtime%20piano%20score%20pdf'. The file also exhibits characteristics of a link farm, with many links pointing to PDF documents hosted on various domains, including Shopify. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The presence of embedded URLs and the link farm structure suggest an attempt to direct users to malicious content, likely as part of a phishing or malware distribution scheme.

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/wb?keyword=ragtime%20piano%20score%20pdf
    • http://nisojot.mountaincitymasoniclodge.org/uploads/1/3/1/4/131453574/5719086.pdf
    • http://files.inmotiongrafx.com/uploads/1/3/1/3/131398497/ziripexekuzus_zukopovufadomun.pdf
    • http://natiro.treasuresbytinamarie.com/uploads/1/3/1/4/131483337/poliwufinisobivof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70339383958.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/vowepukapudos.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/dd_1351_2_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0427/7751/0055/files/jurnal_akuntansi_perpajakan.pdf
    • https://cdn.shopify.com/s/files/1/0431/7613/2774/files/minecraft_forgelin_1._12._2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.pdf
    • https://cdn.shopify.com/s/files/1/0439/1079/1323/files/24281617501.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/tofapivevukuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1629/8393/files/panasonic_bread_maker_sd_2501.pdf
    • https://cdn.shopify.com/s/files/1/0435/6354/8831/files/kilujilosem.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/58163924859.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_off0000570d.bin
298c8dbd04823a06abbea84724d2cab02f51939d61afed3af214add1bc68a30e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x570D 5448 bytes
font_01_sfnt_off00006980.bin
a819f972b0b0992ab793923dc94889ccd654b5293a2f28476f2cecfb8d188937		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6980 10132 bytes

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