Malicious PDF — malware analysis report

Static analysis result for SHA-256 8113fb05c015f4af…

MALICIOUS

PDF

41.3 KB Created: 2020-07-31 07:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 92bc08ba6c363adfa02908b1d4f32eb6 SHA-1: 65cbd81a0e87df41bb339565e0a8782305921f33 SHA-256: 8113fb05c015f4aff47d7e73a3244a21a2f809339528170e23446ef945464692
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious sites. The embedded URL points to a redirector that uses a keyword related to a common software utility, likely as a lure. While no scripts were extracted, the PDF structure and linked URLs strongly suggest a phishing or malware distribution attempt.

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=windows+photo+viewer+to+pdf In PDF document text
    • http://files.mauipopwarner.com/uploads/1/3/2/6/132695365/lotitim.pdfIn PDF document text
    • http://files.francocastilla.com/uploads/1/3/1/8/131856491/9939604.pdfIn PDF document text
    • http://files.melissastonebergerfoundation.org/uploads/1/3/1/3/131381411/rupaka-golemibar.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/1/0429/9682/6273/files/1577481484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9561/1810/files/zeluwezejigebofojef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7630/4544/files/97417134168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/zemiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3029/0327/files/kepekutixixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9534/1723/files/75250663642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/74565938793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulanevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1492/1112/files/zewano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11783771814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1256/2849/files/13702718086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5024/5028/files/58065740854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/15986350506.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 5

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_off000061b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B3 4840 bytes
SHA-256: fbeedb31f04f33f10d667d82912e309779dcfdedbb5c14b6d60ec656ebcde447
font_01_sfnt_off00007239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7239 11240 bytes
SHA-256: 2b50bbddb9fec041e957e9801a95d6a0b4cea44c6f875d6940f2c14f56bd2e5c

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