Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4ff5a477186512…

MALICIOUS

PDF

41.3 KB Created: 2020-08-14 20:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e62f700c49991e9a575ea3151c4cda5b SHA-1: deeb286458f2f6e14044d0e054d197c134d3b65b SHA-256: 4b4ff5a477186512d147b58ca18132c6ec356da3a8dcf865ba96fe8cb79d19a1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that point to a redirector service, which then leads to a malicious URL. The document body, though heavily obfuscated, contains text related to 'anxiety and depression questionnaire pdf' and the malicious URL itself. This suggests a phishing or scam attempt where the user is tricked into clicking the link under the guise of accessing a questionnaire. The presence of numerous Shopify links, some benign and some potentially part of the lure, indicates a link farm strategy to obscure the final malicious destination.

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=anxiety+and+depression+questionnaire+pdf In PDF document text
    • http://files.kfbca.com/uploads/1/3/0/8/130813988/lesirone_volajupiwivixud_lezazumefam_nubow.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/1/0433/9371/2286/files/dufara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/comfort_pro_apu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/assembleia_da_repblica_de_moambique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3127/2346/files/tableau_alimentation_bb_6_mois.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5842/9078/files/78186370322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7688/5416/files/business_intelligence_software_at_sysco.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1345/6550/files/21074778055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/98837119666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/65551613369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0989/9670/files/zuwefan.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 2

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_off0000635e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635E 5288 bytes
SHA-256: cc1c3df7c218a6352c114e5d458895eba46811b9219bed09d9831051ff3750cb
font_01_sfnt_off0000756c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756C 10472 bytes
SHA-256: 61325dade880b62f118a5579622412e3cc15eeaa15073fef7c3146f7ae0e04d6

Open this report in the interactive analyzer, or submit your own file for analysis.