Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2cb465cfdb92852…

MALICIOUS

PDF

47.9 KB Created: 2020-08-08 07:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b7818668d8c9be3653f9117621de1ef SHA-1: e15994957c0bc93c48d0f9807f33f3071c99389f SHA-256: b2cb465cfdb92852eae2524e4311e6a5b0f5437533c8341c094224bc5e29f411
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to external PDF files hosted on Shopify. The primary link, 'https://ttraff.com/pify?keyword=basic+electrical+engineering+textbook+pdf+download', is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning scheme designed to drive traffic to malicious sites under the guise of providing free downloads.

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.com/pify?keyword=basic+electrical+engineering+textbook+pdf+download In PDF document text
    • http://files.gregbenken.com/uploads/1/3/0/7/130738892/1994898.pdfIn PDF document text
    • http://nedokoj.mcclanahanlawoffice.com/uploads/1/3/1/3/131398140/724926.pdfIn PDF document text
    • http://files.naacpaustin.com/uploads/1/3/1/3/131379894/4441134.pdfIn PDF document text
    • http://vilezod.yusofgajahlingard.com/uploads/1/3/2/7/132710621/nojawebatajinewa.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/1/0432/9878/3382/files/50746349371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/bider.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/superbad_full_movie_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/tumazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4326/6458/files/vubojino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2670/1723/files/arrl_antenna_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/23139222393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/zakaton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/67153088205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/35512516253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9942/8766/files/so4_oxidation_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5992/7448/files/gakobaxagizametebonodika.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000639e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639E 5736 bytes
SHA-256: 20a4b1495641b08d86c93be0f6411f858c59a45236c663d255047b50dd9f808c
font_01_sfnt_off00007747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7747 2116 bytes
SHA-256: 49f1c345582212729590e0456707ca92d3838aef8cba26fbcaa28f8c5b0a0640
font_02_sfnt_off00008112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8112 14992 bytes
SHA-256: 135af801d725f8a666d261809e87e40d9c0e1596b0668785da0d96d28c70c11f

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