Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d6ab55e43b49f4…

MALICIOUS

PDF

42.3 KB Created: 2020-08-12 06:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e9d39556cf6a2b64daa7171a18a882a SHA-1: e4d470e49b0026614ebc9e1a5e8330088fe41d70 SHA-256: 01d6ab55e43b49f4c6ac65cc39b9ac107023b5dbfd1a5580b951632ec74eb3a7
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free download for a construction book. It also hosts a large number of external PDF links, many pointing to Shopify, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicated maliciousness, and the embedded URL is known malicious infrastructure.

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/pify?keyword=building+construction+by+rangwala+free+pdf+download
    • http://files.jodikostalastrology.com/uploads/1/3/1/4/131438708/4529b97390e.pdf
    • http://files.busybeeorganize.ca/uploads/1/3/0/9/130969004/gojebifazalomo-maxurapokenoxo.pdf
    • http://files.markneeley.com/uploads/1/3/1/4/131453194/263059db.pdf
    • http://files.crossfitsouthforney.com/uploads/1/3/1/3/131384436/kutatakokoku-sagoxesip-notod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0734/3779/files/5636710542.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/kingdom_hearts_final_mix_english_iso_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/33559591465.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/77131586374.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/the_office_the_accountants.pdf
    • https://cdn.shopify.com/s/files/1/0440/8773/8533/files/66370735070.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/89907221528.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91428743782.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/68127853943.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/fevebevowa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5136/0164/files/basixesaduzesegexaleza.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/a_pocket_style_manual_diana_hacker.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_off0000646d.bin
02d5e5065efd714716a2188203b6d254ee51359ff5acd38664f7ae09d53eff46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646D 5708 bytes
font_01_sfnt_off000077f9.bin
0abe94eb9219e0477f8b57a1e02ce5cb92864f4d24a5f302acc34e990301579b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F9 10648 bytes

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