Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c3fae3bc751bb3a…

MALICIOUS

PDF

47.1 KB Created: 2020-08-08 19:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 43702b839bda0b5a9ec5860b52f4e04e SHA-1: 003611e044eb47074063627c4f10c58aabd145f1 SHA-256: 4c3fae3bc751bb3a5afbc5b0e67b223e5b60322aac99c7e6a66f2874b39fc2ba
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=alimentacion+saludable+libros+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify but point to potentially malicious content. The document body, though heavily obfuscated, contains references to the malicious URL, reinforcing the lure. No scripts were extracted from this sample.

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=alimentacion+saludable+libros+pdf In PDF document text
    • http://ninona.sequoiavalley.com/uploads/1/3/1/4/131407227/kikijade.pdfIn PDF document text
    • http://files.hamptonshousewife.com/uploads/1/3/0/9/130969740/duzukozape.pdfIn PDF document text
    • http://files.ask-noodles.com/uploads/1/3/0/7/130740367/novexogule_dukagepuwalis.pdfIn PDF document text
    • http://files.grandmaceilshouse.com/uploads/1/3/1/4/131408529/92347f03614c5.pdfIn PDF document text
    • http://files.balqeesline.com/uploads/1/3/1/4/131409761/buviroremog_gejabanipuzofav.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/1/0445/6490/6148/files/maths_formulas_for_class_6_to_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5129/3603/files/pexaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2920/6939/files/94552515706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8719/0430/files/925341402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4014/4534/files/mupakogarelolatubevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/narrative_paragraph_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/anemia_aplsica_idioptica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8178/4734/files/open_in_adobe_reader_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9670/2104/files/safepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/33359452495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/93931312115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4879/6309/files/dotab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/8325886924.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_off00006957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6957 5312 bytes
SHA-256: 425fd42318d12c95e7fabeab40b595e9776dcfb68d177f8f5b2c37d317b1b63a
font_01_sfnt_off00007b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B30 11008 bytes
SHA-256: 690a078ecac24e6333bb024eb8f46d2190d8cd46979bcdcd83fa0d0aee415655
font_02_sfnt_off00009ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c