Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8d6780ada840f2…

MALICIOUS

PDF

38.9 KB Created: 2020-07-11 16:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3d002de0852bf43404c143a664d60a4 SHA-1: 63b9ddc3776ff0d77868a1b4e54a543fee8b9b8e SHA-256: 2e8d6780ada840f263d86f662868e1605439070c56b0432cd6ab8a81463b6d9f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a common tactic for SEO poisoning or redirecting users to malicious sites. One of the extracted URLs, https://ttraff.ru/wb?keyword=the%20penelopiad%20full%20book%20pdf, is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body itself appears to be malformed or obfuscated, containing what seems to be a mix of text and binary data, further obscuring its true purpose beyond the link farm.

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/wb?keyword=the%20penelopiad%20full%20book%20pdf
    • http://files.gethilineinsurance.com/uploads/1/3/1/6/131607269/8187401.pdf
    • http://files.bendacappellafestival.com/uploads/1/3/0/8/130873758/tamejidikemawun.pdf
    • http://files.fullmoonontheriver.com/uploads/1/3/1/4/131411197/ponit-samek.pdf
    • http://files.keytoyourhomeph.com/uploads/1/3/0/7/130775870/7968ed6c727d.pdf
    • http://files.fibre-evolution.com/uploads/1/3/1/6/131637302/9b9404.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/wijakibilezujuvegaxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/fudiselabap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdf
    • https://xomejigukeza.files.wordpress.com/2020/07/tageporubu.pdf
    • https://surirupuje.files.wordpress.com/2020/07/kokapo.pdf
    • https://kikibok.files.wordpress.com/2020/07/xijavusizopalizifepiretun.pdf
    • https://neguxesejog.files.wordpress.com/2020/06/forupidago.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/dalalasakevaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/dadexajubol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25843483079.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetidolurat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/36290684592.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31492874922.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_off00005c9e.bin
f599509a16db2c8e8ba7beeac826b993e0aab56f9b8dfe771f4dad68b57b412c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9E 4812 bytes
font_01_sfnt_off00006ce0.bin
671e5e9863130a482ad868eb9f9378181f274d05f770a676e2082d63c6aa09e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE0 9928 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.