Malicious PDF — malware analysis report

Static analysis result for SHA-256 103a8628830a37ab…

MALICIOUS

PDF

44.0 KB Created: 2020-08-06 19:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 24f5a382539f592219278633196b4821 SHA-1: 10a5efc6c8afa1ce99294620840ab1e7af5e0e33 SHA-256: 103a8628830a37ab57b734a797302fba208697daca410d751a30fd77b6cc6d94
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to lead users to a link farm, which in turn redirects to malicious infrastructure. The document body and embedded links suggest a lure related to 'automated stock market trading', likely a phishing or scam attempt. The ML classifier strongly indicates maliciousness, and the presence of multiple redirector links points to a technique for distributing malicious content.

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=automated+stock+market+trading+using+machine+learning+pdf In PDF document text
    • http://files.expansionphotography.com/uploads/1/3/1/3/131398401/javutiwivegipi-lidugolurub-woluvovatizu-miwadal.pdfIn PDF document text
    • http://files.centrestagedanceacademy.com/uploads/1/3/1/6/131637362/1022923.pdfIn PDF document text
    • http://files.omega-usa.org/uploads/1/3/1/6/131636889/be00a2cd.pdfIn PDF document text
    • http://files.seizetheribbon.com/uploads/1/3/0/8/130814711/devakamopebiwib_xilajipo.pdfIn PDF document text
    • http://files.eastworship.org/uploads/1/3/1/3/131381772/wikonipawejon.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/1/0434/3965/3030/files/javascript_check_if_function_exist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/23062758230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/pezukiline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/999029316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8831/3510/files/transmission_block_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/28685758822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/63158902065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/balanta_de_verificare_cu_4_serii_de_egalitati_model.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6284/4837/files/apache_poi_to_html.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/bugapalinekabuwagaguxolo.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_off00006c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8F 5624 bytes
SHA-256: ab4fcb818a14a09034996a79915c96e83fb4ae1a42388fdaf961eca578526e4c
font_01_sfnt_off00007f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8B 10248 bytes
SHA-256: 58cd5d977f2c60de5e39aa72ff616dcd1ca01289728c69e84d17ca3f25636426

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