Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d8442db38863a8…

MALICIOUS

PDF

41.1 KB Created: 2020-07-09 15:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 733383ae2ad48adee15aac605b417e1a SHA-1: f0f96db3797d1d386709009625c91199bb0e6107 SHA-256: 17d8442db38863a80c65e2fadb2b9611a3c1ff5a7cc9697fff40d512db2c2f5c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a significant number of embedded URLs that point to various domains, many of which appear to be part of a link farm. One URL, https://ttraff.ru/wb?keyword=songs%20of%20earth%20water%20fire%20and%20sky%20pdf, is flagged as a known malicious redirector. The overall structure and content suggest an attempt to manipulate search engine rankings or distribute traffic to potentially harmful sites, rather than a direct user-facing lure.

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=songs%20of%20earth%20water%20fire%20and%20sky%20pdf In PDF document text
    • http://files.gdni.biz/uploads/1/3/2/6/132681448/bejutegofizovif_funosal_mejisof_xapek.pdfIn PDF document text
    • http://files.ccblackburn.org/uploads/1/3/1/4/131454950/bodipunobug-voraromuf-dirinabi-kosip.pdfIn PDF document text
    • http://files.sassafrassugaringstudio.com/uploads/1/3/0/7/130740012/f24ac6c924ba9.pdfIn PDF document text
    • http://files.dinothetourist.com/uploads/1/3/1/4/131409709/6473382.pdfIn PDF document text
    • http://files.buckskinrevolution.com/uploads/1/3/1/6/131606231/bajomopuxinulijumur.pdfIn PDF document text
    • http://files.asliagirbas.com/uploads/1/3/0/7/130776841/07f27bfa0f9527.pdfIn PDF document text
    • http://files.southlandfamilyclub.com/uploads/1/3/1/3/131379371/e862cb.pdfIn PDF document text
    • http://files.rajima.net/uploads/1/3/0/9/130969225/rakewej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vixudapojez.files.wordpress.com/2020/06/35533763708.pdfIn PDF document text
    • https://xajuwujijiz.files.wordpress.com/2020/06/57172947201.pdfIn PDF document text
    • https://silokolotojo.files.wordpress.com/2020/07/52830865886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/savowogofoxifonikili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mesujegixaxufusataxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81579197248.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_off000061bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 5420 bytes
SHA-256: 315739e34381e2ab5f553bbb83e4c355bd56cdabd42f2ed48ac1a86e451c2346
font_01_sfnt_off00007431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7431 10336 bytes
SHA-256: 67a842a9303b42e4dd31e8c95eef4adc32e91a0e031489abb5fce24adfd99232

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