Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a2ea786ee1205a…

MALICIOUS

PDF

51.4 KB Created: 2020-07-10 18:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: bcca760bf70357131b3afcea2b569023 SHA-1: 8fd10616b9db0d79232426cd928d3f540e2d4d36 SHA-256: 70a2ea786ee1205a9d9199cd3e8b1367a9bbdfdcbfb788b66a4c44e8b43b26f7
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to disposable domains and are likely part of a link farm designed to distribute malicious content or phish users. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious redirector infrastructure. While no scripts were explicitly extracted, the nature of the links suggests an intent to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=fundamentals%20of%20accounting%201%20pdf In PDF document text
    • http://files.riddlemusicstudio.com/uploads/1/3/0/7/130775001/1420371.pdfIn PDF document text
    • http://files.starlight-angels-ministries.org/uploads/1/3/0/7/130774990/nojonimani.pdfIn PDF document text
    • http://files.tinagutierrezartsphotography.com/uploads/1/3/0/7/130776123/lemagan.pdfIn PDF document text
    • http://files.lifelonglearningpath.com/uploads/1/3/2/6/132681212/3c91b44480756.pdfIn PDF document text
    • http://files.nphsjrwolfpack.com/uploads/1/3/1/4/131483253/pageponiputi_gosalobire_vopepas_fatibo.pdfIn PDF document text
    • http://files.eastcountyrfc.org/uploads/1/3/0/7/130775737/1991001.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xejolaxutibu.files.wordpress.com/2020/06/74663044587.pdfIn PDF document text
    • https://wisetej.files.wordpress.com/2020/06/kikixemozolilojo.pdfIn PDF document text
    • https://mabaxopol.files.wordpress.com/2020/07/birakuneze.pdfIn PDF document text
    • https://jifumulunubi.files.wordpress.com/2020/06/dagezijijafixeki.pdfIn PDF document text
    • https://rokonofivadi.files.wordpress.com/2020/06/88016398248.pdfIn PDF document text
    • https://wevamuxugivi.files.wordpress.com/2020/06/62355089446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/kipigixeduwir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/70728465559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/rivefamijaz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C57 5268 bytes
SHA-256: 56388c54c13eba7417ff5611304135f59145ede95badb835fd29bcc6e5e3c949
font_01_sfnt_off00009e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E35 10208 bytes
SHA-256: 2c41e23eb5e20fabea1aead466b8944c5d1b581d92704c82fd43d9e63fbdba4e

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