Malicious PDF — malware analysis report

Static analysis result for SHA-256 50263c2ffd267c8f…

MALICIOUS

PDF

40.4 KB Created: 2020-08-27 23:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 70f8f1eb3d3c5a1ec1cda44bd5f3ad9d SHA-1: 9b20b9dc4fcf093ee3032bb09aee37580aaa2a67 SHA-256: 50263c2ffd267c8fc28b24937780216990133e7428625a308ce2c638ae3b2630
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, but one critical link directs to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains the title 'The importance of being earnest guided reading questions' and references wkhtmltopdf, suggesting a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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=the+importance+of+being+earnest+guided+reading+questions In PDF document text
    • http://retibovob.pegasustherapyot.com/uploads/1/3/2/6/132695663/zarewifupenumu-tulegobaxopi-zuxefe.pdfIn PDF document text
    • http://zetid.hannahwebster.co.nz/uploads/1/3/2/3/132303382/zuwopib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/angular_form_control_valuechanges_on_blur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0380/4839/files/53820639768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4082/3701/files/xirikomiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1839/3499/files/83300511734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/14614479977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5251/4971/files/ranodefeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/perizutesida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/nawojimoniwovelibemujow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/2987210121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5678/9664/files/72777355758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6171/3813/files/toro_ccr_3650_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/jiwanawax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/61504525320.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52EB 5632 bytes
SHA-256: a273b2d81cf862171515b2987729e8e3be89fbcfa9929270137d36191d8bfac6
font_01_sfnt_off000065d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D2 9464 bytes
SHA-256: d5a6374becc9819cd1ab3aa595e0bd2246cea4a911c02ad7e89b9c4ffb9aa76a
font_02_sfnt_off00008638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8638 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333