Malicious PDF — malware analysis report

Static analysis result for SHA-256 a73cc22a4cc816df…

MALICIOUS

PDF

40.6 KB Created: 2020-08-03 17:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d8d4c0464ead12207ac4826126a5e048 SHA-1: ced8ced52be2804076d91b38562dd54445560ef1 SHA-256: a73cc22a4cc816df2500bf1cc00effd0f337754b8e5eda67b42da66d1aac0547
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The primary malicious URL is https://ttraff.ru/pify?keyword=active+passive+voice+exercises+with+answers+pdf, which redirects to other PDF files hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=active+passive+voice+exercises+with+answers+pdf In PDF document text
    • http://files.talentzambiausa.com/uploads/1/3/0/9/130969825/xiditinirujapi.pdfIn PDF document text
    • http://files.brentfamilychiropractic.com/uploads/1/3/0/7/130775519/wezevowejim.pdfIn PDF document text
    • http://ferotebe.portlandtraumarecovery.com/uploads/1/3/1/6/131606227/wurubipanusawel.pdfIn PDF document text
    • http://pikunumig.thekesine.com/uploads/1/3/1/8/131871864/6889d30581f3b98.pdfIn PDF document text
    • http://dewip.tolgarengineering.co.uk/uploads/1/3/1/4/131483138/5226083.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/1/0435/1574/0312/files/pivazajejejisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0880/3495/files/27494865122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7409/2198/files/pavoxowukenumetezab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/vijunowubilazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9772/5864/files/falokebufutadovewaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7328/9888/files/xumimomamomujoxopovisojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8201/5129/files/65805323374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/votutor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0754/1401/files/group_by_in_r.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8506/9478/files/naruto_shippuden_movie_6_english_dubbed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2139/4343/files/sceptre_u550cv-_u_manual.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 3

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_off0000602f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602F 5420 bytes
SHA-256: 00734c3ec3e8f2161bd5bce151ca5e0a9a848fc408215c32d8e975379d6fd7b9
font_01_sfnt_off000072b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B5 10060 bytes
SHA-256: a768e77aabf61179b3a0523c3ec34add43dff24f3463bb58c9a74783047c56d6

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