Malicious PDF — malware analysis report

Static analysis result for SHA-256 13570c73874d5433…

MALICIOUS

PDF

40.4 KB Created: 2020-08-23 02:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c01ee1f4a3d8624d0e3f791bc56cb26 SHA-1: 2a7b015730419c8adcf0824f337812374491123a SHA-256: 13570c73874d5433be3d43728e1c1196b1194ee51eeede4c9abf3346c8f610b4
194 Risk Score

Malware Insights

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

The PDF contains a link disguised as a 'virtual answering service' which redirects to a known malicious infrastructure at 'ttraff.cc'. The document also functions as a link farm, pointing to numerous PDFs hosted on Shopify, many of which are likely part of the same SEO-based lure. The ML classifier strongly indicated maliciousness, and the overall structure suggests a phishing or malware distribution attempt.

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=virtual+answering+service+canada In PDF document text
    • http://lusabu.wavebeheard.com/uploads/1/3/1/4/131409090/xeduvu.pdfIn PDF document text
    • http://files.leapingllamas.com/uploads/1/3/2/3/132303337/4868565.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/1/0436/1597/7630/files/xisamuvaperotesukan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1882/9206/files/10876518818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7938/4731/files/sojujarogigivaxap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/kapulomiparewiloranosebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8139/1514/files/37620813549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5588/1119/files/fubed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3736/6174/files/palimpsest_catherynne_m_valente.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/22653457701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/38864692894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/pobemewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6717/4040/files/tanzania_protected_areas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9721/8460/files/98679481685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2674/9339/files/duzugevofafivadu.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 2

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_off00005efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFE 5224 bytes
SHA-256: df391d42fb06a00e000a8404a0c57a3b97125120b6a2ea2d4693706afe8ea5be
font_01_sfnt_off000070e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E1 10608 bytes
SHA-256: 35724dcaafd2a5057e7ad038bff276f9d48845693106085b9c50100bb2ef7d50

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