Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f248fda96cd0df…

MALICIOUS

PDF

44.5 KB Created: 2020-07-28 20:40:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a3d5d8692de0027c2e98e779990cf890 SHA-1: c60a9a894c95ae148815c6df84ce0d7aac7953fa SHA-256: 79f248fda96cd0df131bc083996c73c82b62cb1661a83a4e53f49fb38aca9c1f
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a malicious redirector, designed to lead users to external websites. Specifically, it links to a known malicious redirector infrastructure and hosts a large number of external PDF links, suggesting an SEO spam or phishing campaign. The document body, though heavily obfuscated, contains text related to 'Kalender 2018 pdf a4', aligning with the lure of a downloadable calendar.

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=kalender+2018+pdf+a4 In PDF document text
    • http://files.myswimvillage.com/uploads/1/3/1/1/131164205/8091349.pdfIn PDF document text
    • http://files.yoursosweetamericandi.co.uk/uploads/1/3/2/6/132681307/9924891.pdfIn PDF document text
    • http://files.lcsupperclub.com/uploads/1/3/1/4/131406736/1643772.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/1/0431/0981/0327/files/tiliseru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6387/5486/files/49720969973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/mavunivujimowurozed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/35768203171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5471/8358/files/kapona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4655/2230/files/22110500931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/gixus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/zevab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/21251671445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5294/9913/files/zefilawijarisetavefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/80712042396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3839/9912/files/22809245226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5106/3195/files/xavonaduduxuzobixiroz.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 8

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_off00006f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F14 4984 bytes
SHA-256: 227dbe0ea2879c46065bd7b7b8c75602d887318e1c812a73583770819da833fb
font_01_sfnt_off00008012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8012 11004 bytes
SHA-256: 0393eaf2fff0949eba425d8e67904394418317dcee0b64e7822a122b2f11dfe8

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