Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9d8110bfa1362f…

MALICIOUS

PDF

125.3 KB Created: 2020-08-14 23:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acb297b1753c0dc778e5da99455a140b SHA-1: 33db52582460339e600b06b8d9d7b285612d196a SHA-256: 6f9d8110bfa1362f89470091a0174a7e9cf054c95713fabce6d4ff88ae21cdbd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a link farm hosted on Shopify, which is a strong indicator of malicious intent. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to potentially harmful sites, likely for phishing or malware delivery.

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.com/pify?keyword=arcsight+esm+6.+11+admin+guide
    • http://files.athometutoringperth.com/uploads/1/3/1/6/131636655/xifizepaw.pdf
    • http://sawaj.creationresearchontario.com/uploads/1/3/0/7/130775045/f9992.pdf
    • http://files.gracelaurent.com/uploads/1/3/0/8/130813782/fitadalomuwagolulaw.pdf
    • http://fizawafuk.turuncapartment.com/uploads/1/3/0/8/130814328/levobib.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5059/7528/files/play_google._com_redeem.pdf
    • https://cdn.shopify.com/s/files/1/0440/1509/1870/files/82727412867.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/dewomatarolokakutafago.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/difepesokexoral.pdf
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/14003303865.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/visaboxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3441/8075/files/azure_active_directory.pdf
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/honda_ex1000_generator.pdf
    • https://cdn.shopify.com/s/files/1/0455/4902/7493/files/getting_closer_to_god_bible_study.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/38903694783.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8720/files/makiwiravamabufarefamu.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_off00019ecb.bin
9b81b7e805ad4990412cf07457ace488a6557692d48544b4bec86aa12f772e7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19ECB 1876 bytes
font_01_sfnt_off0001a7f2.bin
09a4880cff668eca41b58f2078fb5c908bd66449b8894e0ceba95bebef176294		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7F2 5548 bytes
font_02_sfnt_off0001baab.bin
d009026fc88f73d9e49342524b3f24749af45bdbf54c53a8440e046c77ca4a4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BAAB 14064 bytes

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