Malicious PDF — malware analysis report

Static analysis result for SHA-256 8344f57020cf10f1…

MALICIOUS

PDF

42.8 KB Created: 2020-08-19 23:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5336caabd3756079224de4e0c191ed2b SHA-1: 502611ef822c0ea37092c247be2deab88c60d6c5 SHA-256: 8344f57020cf10f15a68d592b6aac077f4604c6fe155f7689354b7326857e066
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. The presence of numerous external PDF links suggests an attempt to obscure the malicious destination or engage in link farming, likely as a lure for phishing or malware delivery.

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=manual+coffee+grinder+near+me In PDF document text
    • http://files.cngwritersink.com/uploads/1/3/0/7/130776211/0d61b407d.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/1/0435/5679/8613/files/ranger_boat_trailer_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/45591331598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2596/4949/files/film_american_pie_6_sub_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1729/0406/files/91989561940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/48014006788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9515/3058/files/low_back_exercise_aaos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6553/1806/files/8988343991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5522/6781/files/les_contes_interdits_blanche_neige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/easy_snacks_recipes_in_tamil.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 1

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_off000069f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F8 5168 bytes
SHA-256: 808bd257b723a5b79b77d3de5fa9aee988ead9e0c7cb9a20805764cb4d3e5b6b
font_01_sfnt_off00007b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B75 10328 bytes
SHA-256: 14a73ea977c5e52d05f003c410f7532453036fc9686e9928d2e6f5343fc45d55

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