Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e2ebdf8646238c…

MALICIOUS

PDF

44.8 KB Created: 2020-08-08 01:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bcb21bd690dadf8f44cecb7ba8f49a6 SHA-1: f3691c779914b17f52aa720b1f6c8205a58591d9 SHA-256: 67e2ebdf8646238ccf0bcc7bb1cf5bb8efe23801b21164c952e8dbfc1f9c18d7
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to SEO-optimized PDF farms and a known malicious redirector. The document body, though obfuscated, contains a URL that appears to be a lure for a tutorial, likely to disguise malicious activity. The presence of multiple external links suggests an attempt to direct the user to potentially harmful content or phishing sites.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=support+vector+machine+tutorial+for+beginners+pdf
    • http://tamakupef.thewhitefamilyreunionisaiahcarrie.com/uploads/1/3/0/7/130775432/jirogak.pdf
    • http://files.contemporarydancemethod.com/uploads/1/3/0/7/130740573/88659ff0.pdf
    • http://rapuva.vibeperformingarts.net/uploads/1/3/1/4/131409090/wugusulubixekebiz.pdf
    • http://files.duncanleighclassicalguitar.co.uk/uploads/1/3/2/6/132683017/dajewovidagisi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/8872/4639/files/rajulojakudiwoxewigeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/4436/4710/files/pujunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76102764406.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/definition_of_science_education.pdf
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/music_school_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/39826398480.pdf
    • https://cdn.shopify.com/s/files/1/0431/5090/1402/files/87702057321.pdf
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/loxagosunavazabibibaruja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61286624564.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/36251772523.pdf
    • https://cdn.shopify.com/s/files/1/0434/5954/3192/files/tepasivivuwuwetes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063cb.bin
d5aecd2c0df0c6e9f4f594cd5b96b00877f26f80c8a391c8ce31b217bd59f697		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CB 5756 bytes
font_01_sfnt_off00007734.bin
54849dc786d39f60773328d90620407e91bc96fcdc364c9901c93d4953f9d9e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7734 9640 bytes
font_02_sfnt_off00009823.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9823 4324 bytes

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