Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc9ce2960618bfe…

MALICIOUS

PDF

49.4 KB Created: 2020-08-17 02:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8be3aab03e683a88430b3179627c76c SHA-1: 77505e253ff0f10dcacb1151738a2a9efccd458f SHA-256: 5dc9ce2960618bfec76d33cfce0525b357b72fafd88e71954b180ddfca394243
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that appears to be part of an SEO link farm. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to trick users into downloading potentially malicious content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=buku+belajar+bahasa+jepang+pdf In PDF document text
    • http://files.koolkidzbitz.com.au/uploads/1/3/1/1/131163738/wupare.pdfIn PDF document text
    • http://files.readyforsuccesskits.com/uploads/1/3/0/7/130739783/2860722.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/1/0436/5513/5390/files/cambridge_pet_for_schools_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/8610/5000/files/99763399553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3152/7577/files/acg_clinical_guideline_alcoholic_liver_disease.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/monophthong_and_diphthong.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6287/6565/files/lametibopemufoloxebilev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7629/6614/files/58931030336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/rabupopixefawoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1644/4315/files/zatimefawebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/daraz_app_free_for_pc.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 3

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_off00007779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7779 3076 bytes
SHA-256: 497a712fb9c429fe09344df855023082e83b5f312acc8e7d1c6fce013ef33707
font_01_sfnt_off00008273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8273 5632 bytes
SHA-256: 1bac8faed3fc7cf4f85bca7e509d81b2dd42208ba8637ddc22355efd87c9d890
font_02_sfnt_off00009594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9594 10156 bytes
SHA-256: c983b31cdc25a307e3ffc104ad77f33d3d401cbe28182bbeaf531b8845380aa3

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