Malicious PDF — malware analysis report

Static analysis result for SHA-256 106b0b62b1c21cb5…

MALICIOUS

PDF

40.6 KB Created: 2020-08-05 17:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b97f6d956b7c83b94ccb1c6ca2892c77 SHA-1: 552fa943399f40df8fe5ebea0efa6aa2bd6bf084 SHA-256: 106b0b62b1c21cb54194f65417be1e78ce7471b1f66186421c912ed900511d3e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) under the guise of providing a "certified ethical hacker cert guide pdf". This indicates a likely attempt to drive traffic to malicious infrastructure, potentially for phishing or malware delivery. The ML classifier strongly supports the malicious verdict.

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=certified+ethical+hacker+cert+guide+pdf In PDF document text
    • http://files.documentsresearch.net/uploads/1/3/2/6/132695530/morapejawes.pdfIn PDF document text
    • http://files.loudmouthofsl.com/uploads/1/3/0/7/130739542/sewebanibul_naxigi_pakalulo.pdfIn PDF document text
    • http://files.beoilsavvy.com/uploads/1/3/0/7/130775970/2c4d2bdb0172a.pdfIn PDF document text
    • http://files.comicbookposer.com/uploads/1/3/0/7/130776063/fb532.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/1/0429/7133/2767/files/black_and_decker_gh900_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/43306096578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5986/3961/files/69329409162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9642/4096/files/81171969836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3027/3448/files/29273021840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1434/7160/files/dilabadisepimidul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4718/9670/files/jiripage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3406/6594/files/20284218901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1687/1336/files/6236909362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8738/1155/files/92831635460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/learning_french_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4825/6156/files/toliwutekivow.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_off00005fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA5 5208 bytes
SHA-256: bed366a11d269cdce77aa35f99088ee16c73778f4c9aaa7510ba1acf3e8f5244
font_01_sfnt_off00007157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7157 10568 bytes
SHA-256: 8b5c89c830064b97270fca4e973ed7ca5c4b56603f744c969014aedc37412ca1

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