Malicious PDF — malware analysis report

Static analysis result for SHA-256 34105f0b3cef3b86…

MALICIOUS

PDF

46.1 KB Created: 2020-08-22 22:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2d510d23c157c68e6292023e63f9404a SHA-1: 21666b25b11d8e03b7c33283305407892a9caf7b SHA-256: 34105f0b3cef3b86fed4ee6085305e7268a4f9a56320e2f07ebbd2e0f4c3d545
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body and embedded links are designed to appear as study guides, likely to entice users to click through to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and link farm heuristics indicate malicious intent.

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.cc/pify?keyword=navy+expeditionary+warfare+pin+study+guide In PDF document text
    • http://diwad.foundationforadrugfreeworldnewyorkchapter.org/uploads/1/3/0/8/130874493/gosejuwa_zamapanolulujub_xowulujozobis_vagizituf.pdfIn PDF document text
    • http://files.wtfmir.shop/uploads/1/3/2/8/132815866/gojusibe-dojam-fijumoduzuk.pdfIn PDF document text
    • http://lilav.polishmaids4you.com/uploads/1/3/0/7/130776795/3959153.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/1/0435/6449/9105/files/sufimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7694/3000/files/afcat_2020_answer_key_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/63347686582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0925/9158/files/benim_hocam_matematik_video_ders_notlar_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6604/7129/files/ultrasonic_aroma_diffuser_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/setup_wizard_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6744/0294/files/investments_bodie_10th.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/86361621584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2943/8370/files/14502178193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/37351550271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/75868220002.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_off000075f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F5 5468 bytes
SHA-256: a751b52b8ab778564ca8d57d801a9abe8d053b8ffb9acef0be4d5954b4feb5cd
font_01_sfnt_off000088c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C5 10092 bytes
SHA-256: 352f7627656136fd4dbe9c468650239a754148a230c9a9936d67eb9347e89829

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