Malicious PDF — malware analysis report

Static analysis result for SHA-256 77eae4cb03fd6efa…

MALICIOUS

PDF

37.5 KB Created: 2020-08-08 09:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5f8da2e6a7a0bda562aea9830e8ac4f6 SHA-1: 7fd948d08fd83d41cbfda8adcb69f30def114bb4 SHA-256: 77eae4cb03fd6efa9468c7ce705943b074a28601404023fca133152aa7bcf584
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links to other PDFs, many of which are hosted on Shopify and appear to be SEO-optimized for search engines. The primary redirector URL, https://ttraff.com/pify?keyword=alphabet+activity+book+pdf, suggests a lure for free content, which is a common phishing or malware distribution tactic. The ML classifier strongly indicated maliciousness, supporting the interpretation of this link farm as malicious infrastructure.

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=alphabet+activity+book+pdf In PDF document text
    • http://vitofa.dumlavwalla.com/uploads/1/3/1/4/131409090/c1751d5e9dda.pdfIn PDF document text
    • http://files.sundanceretrievers.com/uploads/1/3/0/7/130740065/ea06de436e3771f.pdfIn PDF document text
    • http://files.lifestarbrokerage.com/uploads/1/3/0/9/130969633/bf506a5f.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/1/0428/9832/5663/files/xujolikezopusarafibukugej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/gesixuzag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4775/3640/files/74560479484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3485/9930/files/al_quran_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/kivurogelafed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/80172398541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2696/3865/files/goteporinurepotex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/18730910048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/migedeluve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/8542/5829/files/uud_setelah_amandemen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/24551953213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/wavupemat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8108/8670/files/abstract_test_practice.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 7

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_off00005385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5385 5324 bytes
SHA-256: 9d6d6e6a8c15e233da3d6af17328a0960beab10fb5f4a5e74514d1113a10ebdb
font_01_sfnt_off000065ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AD 10532 bytes
SHA-256: 798044ef8fc0daf067cf9b94d5424d6d5241b6ae1c9bcd86e28e0cdd22d8b2b4

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