Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa1dfa5c6832cac…

MALICIOUS

PDF

43.1 KB Created: 2020-08-21 23:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 61cbe0b8d21c9a425dd14995a213f706 SHA-1: 521bd0755bfb75167c489deec57c1b77563f7d15 SHA-256: 3aa1dfa5c6832cac02d6b21e3e1198460169a1be7572909ef0b4d76e377efb5a
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 external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though partially corrupted, contains the title 'Flowers for algernon summary progress report 10', suggesting a lure to entice users to click the embedded links.

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=flowers+for+algernon+summary+progress+report+10 In PDF document text
    • http://files.anfdesigneddomains.com/uploads/1/3/1/3/131398221/72f6ee875e.pdfIn PDF document text
    • http://files.fanfanbeauty.com/uploads/1/3/2/8/132815791/8536642.pdfIn PDF document text
    • http://files.nourishmentinmotion.com/uploads/1/3/1/3/131379553/wusajovenabaf-pililozajumab-duxofokusa.pdfIn PDF document text
    • http://files.threediamondscbd.com/uploads/1/3/0/7/130740092/371a2ba1b9.pdfIn PDF document text
    • http://files.heatherivanyyoga.com/uploads/1/3/0/7/130738835/6127ae4.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/1/0431/7449/4369/files/discours_dcisif_averros_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3387/7915/files/24106665900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/numopifisakaropeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/86222763117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2456/1829/files/57732362231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0058/5632/files/bibudatof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/taxaxonorejitopibod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7666/3961/files/bonezifisisodebepozimawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/android_dialog_positive_button_color.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/36046165485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/tufazezunezorujodaxuditi.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_off00006a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A27 5564 bytes
SHA-256: 0d39939bb8ff49fbc09f28edc1687b54717611d1d429f46f59bef7c2c475c042
font_01_sfnt_off00007d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D21 10024 bytes
SHA-256: b879c55e643ddf42e334021c92bb226bc67d5d9568fdcdfff35261096d3cc07d

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