Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b01a4191548845…

MALICIOUS

PDF

58.5 KB Created: 2020-08-08 18:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d63e623f17be9dae574f5ce1e82ed3e4 SHA-1: 9d19100f1e66e94484a78da7605d02a52f04595a SHA-256: 62b01a4191548845492a89b5dc570dd0f882c77fc3f3a84a17aacbbcb1cc52c6
194 Risk Score

Malware Insights

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

The PDF contains multiple links designed to appear as legitimate document downloads, but they redirect to a known malicious URL. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's part of an SEO link farm tactic to distribute malware or phish users. The embedded URL is a key indicator of this redirection-based attack.

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=principle+of+atomic+absorption+spectrometer+pdf In PDF document text
    • http://files.jennytownsendlcsw.com/uploads/1/3/1/4/131453749/9313784.pdfIn PDF document text
    • http://files.stlaurentsocialstudies.com/uploads/1/3/1/4/131453944/2291a9c52e392.pdfIn PDF document text
    • http://files.philscrap.com/uploads/1/3/1/1/131164054/10a80574.pdfIn PDF document text
    • http://files.thaddeusproduction.com/uploads/1/3/1/8/131871902/gumatadevab_nozuxinirenu_nururigigofugu_lisesovevezod.pdfIn PDF document text
    • http://files.kempnerumc.org/uploads/1/3/1/4/131453005/6dbba2d1.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/1/0428/5349/9046/files/ff14_archaic_enchanted_ink.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4781/3269/files/wotifebibiwoxewipokode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/9949847508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7795/9833/files/virenilesuvejugusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/wajasano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4570/0262/files/buribimuwame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20675343362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzibuwusupamodugibeboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7473/8581/files/56866633599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/10499600469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2670/8640/files/farmall_h_service_manual.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 6

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_off0000a636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA636 5444 bytes
SHA-256: 776190334201066c0b50f58dc73e2f2146013b9a2b370bb2a9eba2112869e52c
font_01_sfnt_off0000b89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB89C 10516 bytes
SHA-256: b6fc15f8936801718fd604e3f2ac2e25020a190406b4bc7c0614371ab8cdfc43

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