Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20f0b407736f404…

MALICIOUS

PDF

46.7 KB Created: 2020-07-31 10:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dd7f82130aed8a5425cf3cfa9336f85f SHA-1: cca636c925dbb615e9a95373b383cbd8363f18f1 SHA-256: a20f0b407736f40463a3cd9d93b411ee99a547fe9939a70d685094a68f7d6c74
202 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 ttraff.ru. It also contains a PDF link farm heuristic, indicating a large number of outbound links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains text related to 'Cbse board exam date 2020 class 12 pdf', suggesting a lure to disguise the malicious intent. The presence of a download button heuristic further supports a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cbse+board+exam+date+2020+class+12+pdf In PDF document text
    • http://files.shopbeneficialbeans.org/uploads/1/3/0/7/130739646/a554c8bb3f5f.pdfIn PDF document text
    • http://files.threeorbs.net/uploads/1/3/1/4/131438641/1607327.pdfIn PDF document text
    • http://files.wildemu.com/uploads/1/3/0/8/130813837/nimisesik.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/1/0431/3058/5250/files/58867864461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/wesemozokusuzufipizoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4434/7802/files/nivaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/9993651808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/51849807953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1586/3452/files/fitisufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/57529370819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/32681162611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/75210466009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/31571807010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8351/3499/files/gezagezuritolegol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/9051579848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/61798323273.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_off000077f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F5 5492 bytes
SHA-256: 379037aec78571a64306132a1711075fb19a78c7e849b8c72a861ba36d4ec54a
font_01_sfnt_off00008aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAE 10256 bytes
SHA-256: 5a7ea29b1acfd1a9935646f1841bdf8ceb725fa5fefddcf94f64dd0053453b9a

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