Malicious PDF — malware analysis report

Static analysis result for SHA-256 387115d344c37f01…

MALICIOUS

PDF

37.6 KB Created: 2020-08-19 01:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2783378b601653e22bb362155f295d4b SHA-1: e81d6d1dd9da4aa27fcdadca5f2e2792a2b9104c SHA-256: 387115d344c37f018dbcff45ae2fcc49f6c4d2e94e800216a4bdc1c1f3b586c4
202 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify but ultimately lead to a malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the text 'Mini cad viewer free' and the malicious URL, suggesting a lure to download potentially unwanted or malicious software. The presence of a visual download button heuristic further supports this phishing-like delivery mechanism.

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.ru/pify?keyword=mini+cad+viewer+free In PDF document text
    • http://files.yummymummyemporium.org/uploads/1/3/2/6/132695543/dubava.pdfIn PDF document text
    • http://files.savanfinancial.com/uploads/1/3/2/8/132815767/ad5bde.pdfIn PDF document text
    • http://files.barneyspumps.com/uploads/1/3/2/3/132302940/8842740.pdfIn PDF document text
    • http://files.rochesterkino.co.uk/uploads/1/3/0/7/130775055/2585960.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/1/0440/7531/9448/files/38136368709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/payment_summary_annual_report_due_date_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/37605445913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9850/5377/files/94380135300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/81492881443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3771/2806/files/kidonoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0817/8845/files/dawn_spelling_bee_word_list_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1180/9190/files/97656130488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/guides_gamepressure_witcher_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6975/0944/files/10th_marksheet_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9318/1095/files/simple_past_tense_exercises_with_answers.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 8

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_off000055b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55B0 4960 bytes
SHA-256: 8e987b9bc75427fa09fd1fcfb5ce4815d82d682e62761e17eb961df15a91977f
font_01_sfnt_off000066b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B0 10344 bytes
SHA-256: ddffbca84fde97c2990393f270c3e2141a53ab234d42bd05e9c3367a60283895

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