Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5b27f6d2ddf65de…

MALICIOUS

PDF

40.5 KB Created: 2020-07-08 12:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 86a42872113ba616182f4d5cfd8fc1aa SHA-1: e927a839dfddc3c252ebf06dfd3f05f6b8ec27f6 SHA-256: b5b27f6d2ddf65de020f4b5a203e99907bc5713ee128be995b4df12f786cca8b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent link, 'https://ttraff.com/wb?keyword=to%20verify%20ohm's%20law%20experiment%20pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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.com/wb?keyword=to%20verify%20ohm In PDF document text
    • http://files.shearserenitysalon.com/uploads/1/3/1/3/131383553/53b9878d6b0f11.pdfIn PDF document text
    • http://files.dkdynamite1.com/uploads/1/3/1/4/131407263/kojizim.pdfIn PDF document text
    • http://files.creativecounselingsrq.org/uploads/1/3/2/7/132710787/5366484.pdfIn PDF document text
    • http://files.tynksgemstonedesigns.com/uploads/1/3/2/7/132740415/7381d2f1749d4.pdfIn PDF document text
    • http://files.readwithmrsd.com/uploads/1/3/2/6/132682681/86cec62ab78af83.pdfIn PDF document text
    • http://files.thecuriouscatgiftshop.com/uploads/1/3/2/6/132681596/puwakir.pdfIn PDF document text
    • http://files.operationfreedomhealth.com/uploads/1/3/0/7/130775282/3822dbc50e.pdfIn PDF document text
    • http://files.gardenavenuepress.com/uploads/1/3/0/7/130740232/7557f3.pdfIn PDF document text
    • http://files.stonetreematerials.com/uploads/1/3/1/3/131380953/6846582.pdfIn PDF document text
    • http://files.straightoutscribes.com/uploads/1/3/0/7/130739769/rezabafuvaxoza_jakaxo_nawulom.pdfIn PDF document text
    • http://files.maritzavives.com/uploads/1/3/2/8/132815346/zotowelew_lotavapibo_zevubebesoden_sodagufeje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zimixukegor.files.wordpress.com/2020/06/77310180696.pdfIn PDF document text
    • https://futubik230927424.files.wordpress.com/2020/06/velega.pdfIn PDF document text
    • https://tapuxagad.files.wordpress.com/2020/07/31615438393.pdfIn PDF document text
    • https://tokejar.files.wordpress.com/2020/06/75714160336.pdfIn PDF document text
    • https://jumitedav.files.wordpress.com/2020/06/lekuwisa.pdfIn PDF document text
    • https://tepofateg.files.wordpress.com/2020/06/pekigovururazerurakatata.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_off00005e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E56 5376 bytes
SHA-256: ded6c0e3bfed60a5b72e9ead56ec18ef6526f93fbc764b92e70f61b4a9072258
font_01_sfnt_off00007098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7098 10620 bytes
SHA-256: c4833eed00571740c44efcb48e8d9a8116321b0e622844b1de4b8aa8d2d2f48e

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