Malicious PDF — malware analysis report

Static analysis result for SHA-256 16cfb2cdc88af64a…

MALICIOUS

PDF

45.4 KB Created: 2020-08-19 19:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8daa4f7ed1aebd4fbbce72200d85b46d SHA-1: 18409293a63551d4e03c72ab8eb5a6ff48fdc2f1 SHA-256: 16cfb2cdc88af64aba5cd739ffc1281bc758cf0973634acee3a4884da9611d50
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link redirects through ttraff.ru, identified as malicious infrastructure. This suggests a phishing or scam attempt using a link farm to disguise malicious redirection. 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.ru/pify?keyword=afaceri+de+familie+amanda+quick+pdf In PDF document text
    • http://files.babsbeadwarehouse.com/uploads/1/3/2/6/132681392/ritelelujakudetad.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/1/0433/2650/5128/files/45213933783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/mimul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8585/5897/files/dasiwerexugijigijodinavej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6701/4297/files/ibps_bank_exam_materials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2013/2247/files/reduce_size_mac_command_line.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7061/0851/files/carmilla_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/65894587963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/83919549687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/turovapisulasek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1280/0159/files/25750785022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83759083977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9456/4252/files/tikokufubitere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7264/7331/files/blank_map_of_east_asia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/70028502595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/pubuz.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E61 4992 bytes
SHA-256: 68ccd43f1f234a34fc437131d26bf6f6866edcb8fe0de50d95499cba4952d2f8
font_01_sfnt_off00006f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F27 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000077b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B5 10060 bytes
SHA-256: 92437b1206e72c6f6c93139284daffe15b712882186c58551f13154b9690abf2
font_03_sfnt_off00009a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A2C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.