Malicious PDF — malware analysis report

Static analysis result for SHA-256 1852eb4a7b4c65b2…

MALICIOUS

PDF

39.8 KB Created: 2020-08-15 00:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a7a2aa41ed8eba44fc1d1dff618d64d3 SHA-1: 0a674ddf735b4579aacf8801b952c15b1ca7ff3e SHA-256: 1852eb4a7b4c65b23896a24534beddfc30d22ff20e9b145f544c7b5927127de1
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to SEO-optimized PDF files, and a critical heuristic firing indicates it links to known malicious redirector infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=free+fractions+worksheets+grade+1, which is presented as a lure for free educational materials. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt designed to redirect users to malicious content.

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=free+fractions+worksheets+grade+1 In PDF document text
    • http://nolasalu.kasl.us/uploads/1/3/1/4/131409090/galewebizixatuj.pdfIn PDF document text
    • http://nititofe.protectgladewatershed.com/uploads/1/3/2/8/132814930/9115994.pdfIn PDF document text
    • http://files.kathyarcher.com/uploads/1/3/0/9/130968920/wusodupigepofa_pugaxeluzukizut_xifosaviroxuf_xixarajamawonar.pdfIn PDF document text
    • http://files.tetiana.net/uploads/1/3/2/7/132741099/ef6534.pdfIn PDF document text
    • http://lebexe.customcrushfitness.com/uploads/1/3/0/8/130813420/9179721.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/1/0432/1230/8637/files/givazokuvixor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/77271653687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/bupigunetewalenuruxexaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2280/1306/files/ap_psychology_myers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8672/5799/files/joint_stock_company_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nowivozepax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/zotaxonezafuravivamawubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/sumatojafob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/argumentation_skills.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3433/7695/files/38617700766.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 4

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_off00005dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDE 5412 bytes
SHA-256: 1247248e17a5dd8c80e4643cad4de803852f10fdacbe4ff328801939c2d64447
font_01_sfnt_off00007057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7057 9960 bytes
SHA-256: 88a8079d94d209cd9b343cc67983174bac3e98438596ac4bd02aab231a170f98

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