Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4321712fe292f34…

MALICIOUS

PDF

54.6 KB Created: 2020-07-31 04:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9a2ce9653d41cb7fdce43a505c706396 SHA-1: fbeb721135b19dbbddb875dc2a65208cdb2015ae SHA-256: a4321712fe292f344343bed05fc958a0b580051b0aabe7586b127e21754c8e2a
194 Risk Score

Malware Insights

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

The PDF contains numerous links to an SEO redirector, specifically `https://ttraff.ru/pify?keyword=renal+stone+%25E0%25B8%2584%25E0%25B8%25B7%25E0%25B8%25AD+pdf`, which is flagged as malicious. The document structure and link farm suggest a phishing or scam campaign designed to drive traffic to malicious infrastructure. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript for malicious actions, and the ML classifier strongly indicates malicious intent.

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.ru/pify?keyword=renal+stone+%25E0%25B8%2584%25E0%25B8%25B7%25E0%25B8%25AD+pdf In PDF document text
    • http://files.burgundyproductions.com/uploads/1/3/1/4/131483108/rilufuso.pdfIn PDF document text
    • http://files.centennialconcrete.org/uploads/1/3/0/7/130740207/fogupokow_zerarozozefon_dibivamo.pdfIn PDF document text
    • http://files.adcserv.com/uploads/1/3/1/4/131412558/pubudefaru.pdfIn PDF document text
    • http://files.sacramentomedicalspa.com/uploads/1/3/0/9/130969934/6484145.pdfIn PDF document text
    • http://www.opentle.orgIn 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/1/0437/4442/8181/files/61209465242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/kesenavaviduxobinotisisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0630/4166/files/rupapoxevuvof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4409/1557/files/43221167188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2143/4023/files/38377412471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/bigivetegoraxoginapes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/17211699092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/24240743454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9691/4586/files/47228485287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/11783509001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/sulovemogal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/26158214551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/41071561129.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000872f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x872F 11292 bytes
SHA-256: 1687b3d3b421d7b7f42526989d2a27d0e49bfcdd22f46242050645967281e8b6
font_00_sfnt_off00006736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6736 4684 bytes
SHA-256: 8cdb82fa1bd055b2a983f0cf866890d2e5ad2593c49677e6dc40a2dae42b1863
font_01_sfnt_off00007731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7731 6180 bytes
SHA-256: 96a6b1aca62ce964ce1a7f0f1d699b36a218f8ea7d340becdfd918ff57d46c02
font_03_sfnt_off0000a726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA726 10360 bytes
SHA-256: 132bd4d94ff24feb8cdf305757a4929ca61655e218ff4fbe1e60587f26f9cdee