Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff755e54ea4749d…

MALICIOUS

PDF

123.0 KB Created: 2020-07-09 02:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 7d38c7e34f7372ba1f841568069b9e17 SHA-1: 941faa142d1b6dcb8b95b4bb3ababb29a9a410de SHA-256: 9ff755e54ea4749dd42c96e934c85b2cc98dd75dde046ce62dfc940dd3459896
184 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=tempest%20text%20pdf'. The document body contains obfuscated text and metadata related to 'wkhtmltopdf', suggesting it was programmatically generated. The presence of many SEO-like links indicates an attempt to lure users to potentially malicious sites.

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.ru/wb?keyword=tempest%20text%20pdf In PDF document text
    • http://files.milescollegenationalalumni.com/uploads/1/3/1/3/131383889/labukakabavenitega.pdfIn PDF document text
    • http://files.donnastocker.com/uploads/1/3/1/3/131380032/32a97da94ada6d.pdfIn PDF document text
    • http://files.mjlphd.net/uploads/1/3/0/8/130813381/nopoxixibekagajik.pdfIn PDF document text
    • http://files.teach-me-today.com/uploads/1/3/1/4/131411024/fuzux-puwisidewiran-saton.pdfIn PDF document text
    • http://files.withlovezoerose.com/uploads/1/3/0/8/130874541/51722c8b71.pdfIn PDF document text
    • http://files.southkeyscentrum.com/uploads/1/3/1/3/131381411/8a15575d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dukakala.files.wordpress.com/2020/06/gotukanefojokediguxo.pdfIn PDF document text
    • https://gozosalojuj.files.wordpress.com/2020/07/25193674215.pdfIn PDF document text
    • https://pijetodewi.files.wordpress.com/2020/06/52251393485.pdfIn PDF document text
    • https://vofufogufi.files.wordpress.com/2020/06/zarax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fadanamimurusekebunom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.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_off0001adb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADB9 4388 bytes
SHA-256: 8169546414ab1859867e2fbc86f02308ae25f1b460d59f000664bccb44a55765
font_01_sfnt_off0001bca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCA9 10052 bytes
SHA-256: 6478facb9b84377ba93a96c2374f4780a3279d7b6c7946f9e8d29a7c9df3ac51

Open this report in the interactive analyzer, or submit your own file for analysis.