Malicious PDF — malware analysis report

Static analysis result for SHA-256 f21b5352b595653c…

MALICIOUS

PDF

42.8 KB Created: 2020-08-14 10:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a1650fc6a3c91591477f70b3904e02c SHA-1: e8f99f5d5d753e33f06f094960e00b3349abadf3 SHA-256: f21b5352b595653c3b5f5957f46c3eb0f2b3cd9e71c5413fe4b9627181dcabac
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure, which includes a mass external PDF link farm. One critical heuristic firing indicates the presence of links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=habitat+organic+cotton+sheets'. The document body contains garbled text but also includes the same malicious URL and numerous benign-looking Shopify URLs, suggesting a potential SEO manipulation or redirection scheme.

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.cc/pify?keyword=habitat+organic+cotton+sheets In PDF document text
    • http://files.safercompass.com/uploads/1/3/1/8/131856224/bometibodawazexupo.pdfIn PDF document text
    • http://files.lillyandhayles.com/uploads/1/3/1/4/131438120/nazoliti_zodedovu.pdfIn PDF document text
    • http://files.empressreadings.com/uploads/1/3/0/8/130813654/8470633.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/1/0434/0842/5123/files/kogupuvebubalopotexerif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/81426610019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2512/9891/files/ibps_exam_material.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6993/1671/files/90234632379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7178/9469/files/46332163436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3838/3007/files/free_rigged_3d_models.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2778/4103/files/sajopixivalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6681/4617/files/cambridge_advanced_expert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4518/2888/files/denumofujetumewev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4317/6091/files/buddhism_as_philosophy_siderits.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/delosarazaxunubafefuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/jepoxojudis.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
🗂 Part of campaign: empressreadings.com 3 samples

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_off00006a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A27 5128 bytes
SHA-256: 4d25cbb003e3fb195139d51849ebd0a1c5ef5420cd52e8f41b33abc5e1d29fb4
font_01_sfnt_off00007b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8B 10328 bytes
SHA-256: 2e25122a0abdf0a0c1f8d66da4222405738ac281c3201e5195fee1612d154fbb

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