Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca3990e38c1acc7…

MALICIOUS

PDF

39.3 KB Created: 2020-08-13 04:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a47550d0e4ffc227689792294da80fab SHA-1: 3b84d33c5ed634b0c7b8f06931c65caab0612655 SHA-256: 0ca3990e38c1acc7b0ef08bc8df227845b4b71167fd237a63d2b135e980f690e
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as legitimate free downloads, but redirects to a malicious domain (ttraff.com) for further exploitation. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic confirms the intent to distribute potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into downloading malware or visiting malicious sites.

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=an+introduction+to+cardiovascular+physiology+levick+free+pdf In PDF document text
    • http://kudun.markbrayfineart.com/uploads/1/3/1/6/131606066/7316415.pdfIn PDF document text
    • http://files.shinestudiohairsalon.com/uploads/1/3/1/8/131856380/f3e9d249461e.pdfIn PDF document text
    • http://files.hunterhomeinspection.com/uploads/1/3/0/8/130814118/soxome-wajetegeze-varexezat-xejiwexerodizun.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/1/0430/7451/9191/files/quest_belief_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8999/3621/files/how_to_make_wax_in_little_alchemy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4283/0496/files/article_370_and_35a_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7044/5975/files/vtu_electronics_and_communication_engineering_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/guvavinilemevuwitiborej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/31725161154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7025/5267/files/micro_center_seattle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6612/9574/files/83898016327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/kundalini_shakti_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25322908130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/52423008639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/mesemokobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/free_offline_to_word_converter_software_download.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A56 5516 bytes
SHA-256: 9c5ebfe72409b0e0d4422b7b0aecebf1549093ff20afd319d001c57b03d367b2
font_01_sfnt_off00005d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D17 10096 bytes
SHA-256: 8cbca9ee9d0972aa718e6807bee083071193feb57f395c7def60a963dbf4eee5
font_02_sfnt_off00007f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F96 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c