Malicious PDF — malware analysis report

Static analysis result for SHA-256 86453277eb2d2adb…

MALICIOUS

PDF

45.5 KB Created: 2020-08-15 14:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 556cb43749b64d78e55b9b2c1703975c SHA-1: 8a63f28f2eaf8fc1d662032ffd9b9eac45c3ceba SHA-256: 86453277eb2d2adbca50d832bc0f69800fd8f008bf55f77a404585de8bbe3d44
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as legitimate resources, but the primary redirector URL is flagged as malicious. The document body, though heavily obfuscated, contains the malicious redirector URL and several other URLs pointing to PDF files, suggesting a link farm or SEO scam. The ML classifier strongly indicates maliciousness, and the heuristics confirm the presence of malicious redirector links and a link farm.

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/wb?keyword=calendar%202019%20with%20weeks%20pdf In PDF document text
    • http://files.dreammasterbuild.com/uploads/1/3/1/1/131163740/zowoxodiwekef-paguxumutuv-jinozanuve.pdfIn PDF document text
    • http://files.shannoncangey.com/uploads/1/3/2/6/132681772/muteworizil.pdfIn PDF document text
    • http://riguvudek.littlehandsomez.com/uploads/1/3/0/7/130740496/poratapiduzasuz-lonigitinab.pdfIn PDF document text
    • http://files.anonymityfilms.com/uploads/1/3/1/4/131437123/c9805dc2510.pdfIn PDF document text
    • http://sivozab.ristorantepizzeriacasamatta.com/uploads/1/3/1/4/131453870/zujedomis.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/1/0440/7299/2918/files/58439231550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7066/6392/files/33803074426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/71830429182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2017/3983/files/wejanomijugibebipubenexor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9628/0993/files/psychology_articles_on_human_behavior.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1363/6259/files/gujagozazafoloba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9628/6119/files/mass_incarceration_in_the_us.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/65529855258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8004/8037/files/concept_of_spatial_frequency_filtering.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7061/0851/files/neo_bomberman_game_free_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6799/7344/files/pdf_to_word_converter_free_with_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/6666941989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/vuzononewejeladu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7691/0242/files/byu_housing_guide.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000723c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723C 5672 bytes
SHA-256: d367fb588c7f4d15c4cf9220fb8c8d8dd8f1612a9d229d19ce9fc85c117fea77
font_01_sfnt_off00008597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8597 10360 bytes
SHA-256: 656f23fea00e6b6f5409adf8049005744692767bec44dd4bc52afc413461830c