Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6a55f3fdf892b7…

MALICIOUS

PDF

51.6 KB Created: 2020-08-18 20:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6cbf3216d08bfa458b0dcd7805ee9a2a SHA-1: b597a5eb2a33baf193ede8586e8a3a381dcb619b SHA-256: cd6a55f3fdf892b77f42dcab6c145c32257b894e507b70d7412421f9f4ae3cc6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, identified as a link farm. One of these links, https://ttraff.ru/pify?keyword=dragon+nest+mobile+guide+assassin, is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, and the document body is heavily obfuscated.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/pify?keyword=dragon+nest+mobile+guide+assassin In PDF document text
    • http://files.balance-bicycle.com/uploads/1/3/1/4/131406222/8170486.pdfIn PDF document text
    • http://files.4lifeinc.org/uploads/1/3/0/8/130813821/mevebi_vumiji_maripopas.pdfIn PDF document text
    • http://files.pleasanthillartcenter.com/uploads/1/3/1/3/131384424/sedapadomaf.pdfIn PDF document text
    • http://bufajiwen.popgalleryorlando.com/uploads/1/3/0/7/130776366/f980ef59.pdfIn PDF document text
    • http://files.beneathawp.co.uk/uploads/1/3/0/9/130969710/zaraxovipo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/rpp_descriptive_text_smp_kurikulum_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/84067272494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/xasedezulufuxuvivukipofon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/aaron_boone_yankee_uniform_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/grade_5_decimal_division_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/54300908215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2866/5752/files/willingness_letter_to_join_job.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/89969271212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/95553512493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/62780836327.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CF 5284 bytes
SHA-256: 54d5201cb5fad70f242ccaf2ea390e9f81aa50595ad4749a653b6540491cc0a0
font_01_sfnt_off000088a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A7 10312 bytes
SHA-256: c80d7b136a72351ea767c494b55b4325dbb9afef4c38cb5060b332818f76ef5c
font_02_sfnt_off0000ac2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC2C 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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