Malicious PDF — malware analysis report

Static analysis result for SHA-256 97472f4af933a4c5…

MALICIOUS

PDF

34.5 KB Created: 2020-09-02 06:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 874598e228fe2f7b35c09a7ea61c1275 SHA-1: 2a5e5c13f6d5035361fe751b687a71189a1aba81 SHA-256: 97472f4af933a4c5d2abc00621753bee846fa94a5d441f8b9a848e3741941f38
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically `https://ttraff.me/pify?keyword=wilson+medicinal+chemistry+book+pdf`. This technique is often used to obscure the final malicious destination and evade detection. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded links points to a phishing or scam attempt.

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.me/pify?keyword=wilson+medicinal+chemistry+book+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6499/1649/files/alan_walker_video_song_alone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8226/0384/files/star_wars_audio_books_free_download_mp3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1920/5789/files/mtga_on_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/calculus_problems_and_solutions_ginzburg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3332/0872/files/zegofukaxopebagupepuzis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6479/2990/files/85227920953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4178/2946/files/pikinulorenope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2508/9191/files/sajuzomoroxadupizofom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4986/8712/files/75045757882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/cartoonito_italia_tv_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8108/8670/files/kofowevodare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/kasulisinedorijugaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0416/4256/files/kijukurabawofomobitub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/wemirinoralewode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/7490/3205/files/pere_goriot_quotes.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48F5 5712 bytes
SHA-256: 9a28bae47f227ff2528f70860d833eb793b6c4f5c286a0dcc4068c5e2ee8d155
font_01_sfnt_off00005c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4A 9708 bytes
SHA-256: fb0d12e969644c126b167c7ca17519a472e25e653a0b2183cc999d53a248f8ce

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