Malicious PDF — malware analysis report

Static analysis result for SHA-256 a956f551b3b63181…

MALICIOUS

PDF

47.2 KB Created: 2020-08-16 20:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d5ad733e14ba81405f584a81b5677282 SHA-1: a383963d3ddc768cc2c5a539d99b8c12d21b1533 SHA-256: a956f551b3b6318125c32dafe8d313078f4b397d954db4886b3ad5d0c77337ab
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=google+chrome+for+android+2.+3+free'. This URL is presented within the document body, disguised as a free download lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many hosted on cdn.shopify.com, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The ML classifier strongly flagged this PDF as malicious.

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=google+chrome+for+android+2.+3+free In PDF document text
    • http://files.brentwoodbayvet.com/uploads/1/3/1/4/131438353/8058f81f45cd82.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/1/0435/1311/8872/files/nojolunupuzenabekumon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/change_management_strategies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8856/7706/files/detail_magazine_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3265/7575/files/toddler_bed_sheets_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7352/6178/files/bogiburox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/xamogimogakegonopijixemox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9899/5878/files/non_alcoholic_cocktail_recipes_with_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/76912658646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/nilinuxinejiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1650/2939/files/7465294054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1287/files/sujejaxuwawafuforu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/18500625082.pdfIn PDF document text
    • https://login.salesforce.comIn 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 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CB 5324 bytes
SHA-256: baffb02a3bdac35ab60b4c3a80203e96b65a5ba96ed0c3f3d77497837a11d6ee
font_01_sfnt_off000073b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B8 14864 bytes
SHA-256: fef9a56987d1b7b02490d12944ccfc0f16466134d4ba37ed793457202bcdee97
font_02_sfnt_off0000a1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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