Malicious PDF — malware analysis report

Static analysis result for SHA-256 335a744735dca78e…

MALICIOUS

PDF

39.1 KB Created: 2020-08-20 13:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e870934f8b98c528bcbe7241d5663a80 SHA-1: d1e7dd89e8705ff18c1683755603b4fc9c7204a6 SHA-256: 335a744735dca78e52d7be8132c73796e8956a4db2206e08456ed569547c25a7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body contains a URL that leads to a redirector service, which in turn points to a Shopify domain. This suggests a phishing or scam attempt where the links are used to obscure the true malicious destination. The ML classifier also strongly indicated maliciousness.

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=sedimentary+rock+worksheet+elementary In PDF document text
    • http://vazejota.thinking-drinking.com/uploads/1/3/2/6/132680981/gisawawirinebel.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/1/0432/9055/8622/files/26174919347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0709/8529/files/biochemical_analysis_of_fish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/kurikulum_pendidikan_islam_di_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/singular_and_plural_nouns_worksheets_grade_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/kovelebosina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/cha_cha_slide_audio_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/stein_complex_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3629/3785/files/niziroposotodup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/lewenonowor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8023/4661/files/estructura_de_la_administracion_publica_en_guatemala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4435/5739/files/18155050788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1330/8325/files/bowunowozelurowonepabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/makikovujoxomawofejim.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_off00005a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A38 5540 bytes
SHA-256: 2dbe54924a7e67dc011dedca21949c67993eb20b202cfefbfc476f77910e2233
font_01_sfnt_off00006cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF4 10176 bytes
SHA-256: 3f97758edf9349bbc8a47679d67cd4f1bcc6c24361a3621e9c995178e722d363

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