Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a364c1130e6377…

MALICIOUS

PDF

39.4 KB Created: 2020-08-11 06:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fd7b21b15d5fccabce6ddb57a417a46 SHA-1: caf14508f246446b43dcc2e44926e9df2316fed5 SHA-256: 00a364c1130e63771ce96a420bb20043c539b11d11fa2f55508ecb02bd861343
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a document title, aiming to lure users to a malicious site. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The ML classifier strongly indicated maliciousness, and the presence of a remote-support lure heuristic suggests a potential attempt to gain unauthorized access.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=civil+engineering+plans+drawings+pdf
    • http://tokem.sprucemeadowschristmastrees.com/uploads/1/3/0/8/130814124/jonuvevunelad-bisojo-talem-nawenizorerana.pdf
    • http://botusubu.artistsfusion.com/uploads/1/3/1/4/131454526/rolidelazabasubi.pdf
    • http://files.thorntonmetals.com/uploads/1/3/1/8/131856039/muwodutaxetal-kutepujovo-xepedagonavu-lenawefozujus.pdf
    • http://files.meditationgiftshop.com/uploads/1/3/1/8/131871871/tonabajilevipo.pdf
    • http://files.emergingfield.org/uploads/1/3/0/7/130775053/05bd5ecfe1869c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3364/7525/files/30315586003.pdf
    • https://cdn.shopify.com/s/files/1/0434/5410/3713/files/solid_principles_c.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sebifoxof.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/speedrunning_gold_split.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8291/files/72816216456.pdf
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/jojemutojilitit.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/mapix.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/47587305628.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0711/files/23562011194.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5383/files/2083750001.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/posedupuwipegoraguvuzi.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_off00005c7d.bin
dda1262f6a0fcbc56e041a3a7ad06f44b8e7d0aabe69cc5213a1c0c0fb18e039		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7D 5264 bytes
font_01_sfnt_off00006e87.bin
d1c4b90c195c78ed837b1a9a40e618c2c9c875fc3021124b98187c18a2068e5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E87 10020 bytes

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