Malicious PDF — malware analysis report

Static analysis result for SHA-256 96dd5d0772c70872…

MALICIOUS

PDF

35.8 KB Created: 2020-08-13 23:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c94f17eb2b3db0f73f3213de9d6228ac SHA-1: 528a09e40e97a7294020d4504292179dac17c936 SHA-256: 96dd5d0772c70872518574cbd71dd95b43c42b5c2bc775398827916ac38fd1e2
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.ru), while another noted a large number of external PDF links, suggesting a link farm or distribution mechanism. The document body contains obfuscated text and URLs, further supporting a malicious intent to redirect users to potentially harmful content.

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=avancemos+1b+pdf In PDF document text
    • http://files.phase1trackclub.com/uploads/1/3/1/4/131437157/8534241.pdfIn PDF document text
    • http://zowek.at1space.com/uploads/1/3/2/7/132710797/aaa073e3c0d.pdfIn PDF document text
    • http://tafokexi.glasskiteanthology.com/uploads/1/3/1/8/131871486/1efd5a3da.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/1/0433/8660/1626/files/tijexofegasirakisugon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/fetal_distress_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/juwugetebebejakopisojijot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4667/4330/files/complejo_renina_angiotensina_aldosterona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/26275317763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/94210773121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7178/9469/files/afasia_de_broca_y_wernicke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/fifoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/juganixunokomoponimebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/radical_function_graph.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.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 5

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_off00004caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CAA 5416 bytes
SHA-256: ab8e26797fb8de6a5815bebcdaa9c538478ef6338bb04d9953c9e9ad2d5858a6
font_01_sfnt_off00005f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F06 10544 bytes
SHA-256: 52f30250597d2751dbcf9b4364e6868617e980dbc35fc5b2ccc974be31024c1b

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