Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84a5821da17b78f…

MALICIOUS

PDF

41.1 KB Created: 2020-08-25 16:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fdacbf098bf997b9ff9128980a37c82d SHA-1: d01107dbc20d4f0090cbf803dfa9fffca68399be SHA-256: b84a5821da17b78f1e4b459cc5a971121fe48463307b0da7e45dc9b7481766f5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many hosted on cdn.shopify.com. The primary malicious URL identified is https://ttraff.com/pify?keyword=damn+good+advice+pdf, which is likely used for redirection. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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=damn+good+advice+pdf In PDF document text
    • http://files.harveyhensley.com/uploads/1/3/1/0/131069978/sefexixakilivag_jatel_mojafezef_pixewepokipu.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/1/0431/2884/8538/files/65810522513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/basic_pronunciation_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9911/2099/files/fuzoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/lurisajezajixakuzev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/5151/0936/files/shazam_trailer_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6267/3054/files/pawujapivamisexufapon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9416/3102/files/map_of_africa_countries.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7294/5312/files/58830993294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/wozebuvalujodafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70282461387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1258/7429/files/bob_marley_songs_masstamilan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/3869/4565/files/15107706873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6773/4171/files/30863039604.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 3

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_off00006481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6481 5228 bytes
SHA-256: a64f4fd579e948a3eb9707472cf9e5876d3e1ef8742b41d0c90b8898fabb17ee
font_01_sfnt_off0000764b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764B 9856 bytes
SHA-256: 0a60aeab8e39853676c8cfb8c6dbe49e6b46b64276ff88e96121ca0a41e8dd5a

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