Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c6c19696820c95…

MALICIOUS

PDF

71.2 KB Created: 2020-08-25 13:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7ee643682ea63ce078df4499db8ee28a SHA-1: 8a6a775d21820909f6f83bb1fb9aa6a751aaa838 SHA-256: 74c6c19696820c95e018e0f690b65c89628a273ff83ba92d1a15e312bbeddf5d
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.cc) which is flagged as malicious. This suggests a link farm or phishing campaign designed to drive traffic to potentially harmful content, masquerading as legitimate downloads. The presence of embedded URLs and the ML classifier's high confidence further support this assessment.

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.cc/pify?keyword=dreambox+learning+android+app In PDF document text
    • http://duwom.dpcoachingcentre.com/uploads/1/3/0/9/130968921/lawoma.pdfIn PDF document text
    • http://files.regalawardsde.org/uploads/1/3/1/3/131383544/7956350.pdfIn PDF document text
    • http://files.thelale.com/uploads/1/3/1/4/131452735/xapifodawa.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/1/0427/6636/8935/files/lecture_notes_on_data_structures_and_algorithms_using_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/kugutapafapukigafixov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/jugubamusika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/3079/7477/files/jonubinamogodewajut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8437/2386/files/matplotlib_dynamic_plot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/31246071353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4061/2262/files/56614058796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4834/5500/files/bride_of_the_century_episode_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2258/2679/files/cherry_fruit_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9948/3301/files/c_stl_iterator_implementation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/29497437925.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA5 6676 bytes
SHA-256: ee6f16e0c8fbbdb31aff1aaf3ce7e76a5fe775949f4c4bd5e090cddb5182f6aa
font_01_sfnt_off00008d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7D 5308 bytes
SHA-256: 19cad1d7e63f9bac3322e41c50746b43d72c3e6329383969ecaed4b2fc8aa47b
font_02_sfnt_off00009f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F6B 15728 bytes
SHA-256: 2f6bd37d8dd093ff8839706754de6a8827d546675b8a85b8a74021f43ceafe34
font_03_sfnt_off0000c1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DA 13720 bytes
SHA-256: 7c17bf16236c12b58a175ec492de4fbaaf340bb1ad139619a0fa8d83cd73d2e3
font_04_sfnt_off0000eda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA7 18280 bytes
SHA-256: 14f4fdbb1c1f03b51b28432fd4af0aa8e9554b673323288907526c9dccc06145
font_05_sfnt_off00010710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10710 1748 bytes
SHA-256: f0a88f0ebc5209daefb10e1ce02cecb9ab784a7a91854bfb646a3c59a620ceda