Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67244e325f03738…

MALICIOUS

PDF

51.1 KB Created: 2020-10-02 00:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 835ffd42b34ccc83d6344477cf5f2c3d SHA-1: 15c77a48ae5829636ebe5a79b55b677c53b37d9f SHA-256: f67244e325f03738f98c44316e4283d07325e94023a9341a5dd88076e6e69257
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, disguised with a seemingly innocuous keyword. The heuristic PDF_SEO_LINK_FARM indicates a large number of outbound links, many of which point to PDFs hosted on mozfiles.com, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is used for malicious redirection or phishing.

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://ggtraff.ru/strik?keyword=tabla+pitagorica+para+completar In PDF document text
    • https://site-1040977.mozfiles.com/files/1040977/wilolux.pdfIn PDF document text
    • https://site-1037211.mozfiles.com/files/1037211/44693706662.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/20845663517.pdfIn PDF document text
    • https://site-1036973.mozfiles.com/files/1036973/bovotizenu.pdfIn PDF document text
    • http://files.nexuseconomics.org/uploads/1/3/0/7/130775974/3931035.pdfIn PDF document text
    • http://vapavez.investingwithheart.com/uploads/1/3/1/0/131070381/3002790.pdfIn PDF document text
    • http://files.thehammam.org/uploads/1/3/0/7/130775405/todavog_dipagid_pezes.pdfIn PDF document text
    • http://salulujo.cornerstone-civil.com/uploads/1/3/0/7/130775982/witiwomolijudajud.pdfIn PDF document text
    • https://site-1036946.mozfiles.com/files/1036946/77684466836.pdfIn PDF document text
    • https://site-1038527.mozfiles.com/files/1038527/36781410620.pdfIn PDF document text
    • https://site-1036735.mozfiles.com/files/1036735/90572881920.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8798/9398/files/tyler_perry_for_better_or_worse_season_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3798/3388/files/stevens_point_police_department_non_emergency_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/kufowutudogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/0805/0588/files/20015529595.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DA 4844 bytes
SHA-256: 6847b1fe11e519d5d0d4776a5ebf718bad4b795a28777775f4c69fec9b081e36
font_01_sfnt_off0000764e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764E 10932 bytes
SHA-256: 585eb86119b46a19e0c101d92bfdb931512bc1a36b6d94bb58c364db67286a8a
font_02_sfnt_off000099f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99F4 16088 bytes
SHA-256: fff8b70d67420864e2a263fdbbaad35efae781e73a516d3cf38207748e8715b5
font_03_sfnt_off0000aea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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