Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a3a91ff6862d0c…

MALICIOUS

PDF

39.8 KB Created: 2020-08-22 19:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b9ac7bb550f59499f1f31aa6aac87684 SHA-1: 523ab61722a6da86ade8b7c5a001a52833e0105e SHA-256: 78a3a91ff6862d0cdfcc7f94149cbbdb7aadf3cd7adf825b3e1ad593cf6c36c8
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL that masquerades as a financial statement audit report example. This lure likely aims to trick users into downloading further malicious content or visiting a phishing site. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=financial+statement+audit+report+example In PDF document text
    • http://files.dotshallmark.com/uploads/1/3/1/0/131070792/dozalisipovabox_wugasami_valisemavej.pdfIn PDF document text
    • http://files.tomdangofficial.com/uploads/1/3/1/3/131380292/39c67ff54c820f2.pdfIn PDF document text
    • http://files.sugarmaplecharcoal.com/uploads/1/3/1/4/131407315/f43f682062e4dd.pdfIn PDF document text
    • http://jubam.shelbymbalik.com/uploads/1/3/2/6/132681670/nebavofedajekewer.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/1/0429/1559/4393/files/arithmetic_of_binary_numbers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/acuerdo_de_ginebra_1954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/fitiwijirezoberetetuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/mcdonalds_coupons_ontario_november_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/36936198968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1414/4675/files/34924895523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4060/2269/files/bestiario_cortazar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/15499184166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/xojuvuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5156/3670/files/bm_das.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0461/7119/files/37276061371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0379/5877/files/88390122161.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 6

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_off00005dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFD 5240 bytes
SHA-256: 23ba2e43eb07d8b19d7432db16e3fd3a8e8b357922cff38aec3bdb9dd00278cd
font_01_sfnt_off00006fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB1 10072 bytes
SHA-256: 68df2b9e0071a5d8a016052c1dfa27112cb441f6c6173e446eaef16c65617c92

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