Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a4e91dd8a019d91…

MALICIOUS

PDF

51.7 KB Created: 2020-08-17 12:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f394d756c29d754400621e5322d304ea SHA-1: 536085cd1f316e503bde73a256b4344ba00421f2 SHA-256: 7a4e91dd8a019d9126f8ab5f3d303fb020caf41cf26a1cffac47d08f9258572c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The embedded URL and the document body text point to a lure related to service discontinuation, directing users to a malicious redirector. 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.com/pify?keyword=template+for+discontinuation+of+services In PDF document text
    • http://nadas.learningpgh.org/uploads/1/3/1/8/131872096/080b7718a1c3.pdfIn PDF document text
    • http://files.alternativefruit.com/uploads/1/3/1/3/131379709/wakuvejoraderuv-tubafolemi-metapibefudi-vuliriledukuzu.pdfIn PDF document text
    • http://files.chrismayne.ca/uploads/1/3/1/4/131483200/wunuladar_kikagemokerasij_konuv.pdfIn PDF document text
    • http://files.tricitywv.com/uploads/1/3/1/1/131164009/xujazagajovadusa.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/1/0429/8381/7375/files/puwuwijobifopelemoxumutog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/49372302109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/bapozetukapowodamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/15590423952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3740/6870/files/payback_2_apk_son_srm_indir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6767/8618/files/98881482373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/email_writing_examples_informal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1093/3414/files/48095385344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/74837128762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1567/3752/files/74550370898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2635/7160/files/bruno_munari_design_e_comunicazione_visiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4040/6695/files/re_art_e_i_cavalieri_della_tavola_rotonda_libro.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_off000082ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AD 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off00008ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA8 5312 bytes
SHA-256: d68f158543fcf280db2a9d9834c193471a1524f0a27f7ad959d6bf5069c3e19f
font_02_sfnt_off00009ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA3 10204 bytes
SHA-256: 1a8327eb6c921ec561d2a358f08a4384d0ffb895f17417cc7bcb678939eb1ead

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