Malicious PDF — malware analysis report

Static analysis result for SHA-256 4435b854c49caaff…

MALICIOUS

PDF

40.5 KB Created: 2020-08-25 09:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ee7f17cbe48696d7f1e53fdcf784bbf0 SHA-1: 2a7cfc17d3bad65287793209be2beac8fb1fd3cb SHA-256: 4435b854c49caaffc593fab7281ff93222998f275fa9f3a11522cf389e2b7e83
202 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 a phishing or scam attempt. The document body, though heavily obfuscated, contains a URL that points to a redirector, which is likely intended to lead the user to a malicious site. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=learn+english+free+printable+worksheets In PDF document text
    • http://files.jameslpoole.com/uploads/1/3/0/8/130873769/zuginumaxaji.pdfIn PDF document text
    • http://pawuwez.cantonohiolandscaping.com/uploads/1/3/0/7/130776321/3998718.pdfIn PDF document text
    • http://tadijaka.chesapeakeorchestra.org/uploads/1/3/1/4/131452938/4114670.pdfIn PDF document text
    • http://kuzaweta.abocomix.com/uploads/1/3/1/4/131408022/3089627.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/1/0434/5479/1832/files/14529362131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/tamibunubuxagotujegikuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/4529/5004/files/28091629966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2352/2216/files/w_b_c_full_form_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4112/6565/files/lazudulitogife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3981/6861/files/tabobikasanozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3032/8997/files/37321087699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4983/5930/files/gilakululalomepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/ahk_auto_clicker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/calculus_of_variations_springer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/45768703753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/jedasevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/0531/3946/files/41713116566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/zakolim.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6009 5400 bytes
SHA-256: a64617314dc29758f98e0c00bd9bc47b3aede6c471e4fc63b85b94c19d296669
font_01_sfnt_off00007276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7276 10080 bytes
SHA-256: 8d93c0251939764f02763f920118c5b55c2974cc8525296b2d6c514e73b53b2a