Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c7c921177f2775…

MALICIOUS

PDF

40.1 KB Created: 2020-08-23 18:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 594e20d4943342cb6e75ebef68e12f60 SHA-1: 664383ce9becb2c9d35eb4daa0850adbd7b866c5 SHA-256: 71c7c921177f27757e63c367fd06ef8ab5194d4b07f7b2f18a09a6b28239d688
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.cc) that is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting a lure for "Excel flowchart templates free" and includes the malicious redirector URL. The presence of many links to external PDFs, some hosted on Shopify, suggests an attempt to create a link farm for SEO poisoning, likely to drive traffic to 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.cc/pify?keyword=excel+flowchart+templates+free In PDF document text
    • http://files.miamidogshow.org/uploads/1/3/0/8/130814226/wekedejekodevulo.pdfIn PDF document text
    • http://fovazili.torontocycling.org/uploads/1/3/1/4/131438379/633f8aa027.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/1/0432/6172/2786/files/avast_secureline_crack_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0569/6407/files/php_contact_form_with_validation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9354/1535/files/mini_14_full_auto_conversion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/24166498221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9282/0647/files/military_bugle_wake_up_call.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8497/1173/files/24964955483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/73225053532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6870/3398/files/amenaza_de_aborto_primer_trimestre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/40244287472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/lanareruwonesakak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3564/0476/files/45250387085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/bahra_cable_catalogue.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_off00006082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6082 5372 bytes
SHA-256: a13a7113fbdfc0b16fb0ee450c146fe8a9a1dd83cc81c2cef7f9bdd89e2c2e2f
font_01_sfnt_off000072b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B6 9712 bytes
SHA-256: 5368cb5ea43af59e95a3b5f27e7936feaa3df3e9de84e1864e9c0e59131bb494

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