Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb8d66beb007c809…

MALICIOUS

PDF

35.0 KB Created: 2020-08-05 12:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e322685af6000568f613af0dd103c66e SHA-1: bba658f83f3765b4d1bf12dea9fe7a67888af053 SHA-256: eb8d66beb007c80929bac2259548f35a543fcab38d1b0af8d952f68d795cd21f
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body text, though heavily obfuscated, contains the phrase 'appositive phrase worksheet with answers pdf' and the malicious URL, suggesting the document is designed to trick users into clicking the link under the guise of providing educational material. The ML classifier strongly supports the malicious verdict.

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=appositive+phrase+worksheet+with+answers+pdf In PDF document text
    • http://files.utile-it.com/uploads/1/3/0/7/130739951/ledejazuxe-tuwojewijejufu.pdfIn PDF document text
    • http://files.ppischoolpics.com/uploads/1/3/0/7/130775014/5345076.pdfIn PDF document text
    • http://files.thomasmccartypromotions.com/uploads/1/3/2/6/132681452/888470.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/1/0429/6550/0060/files/xefodonutarowokobozej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5148/2278/files/57651605805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2670/2755/files/99357861908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8820/6238/files/96986198942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1704/3111/files/miwevizofof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2143/4023/files/dozexexavuwajolerit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5845/2897/files/gods_pocket_rotten_tomatoes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/wulozokesivetisosiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7495/9000/files/noguwabovapogunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/luwawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1750/1853/files/attach_file_in_outlook_email.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 8

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_off00004ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ACE 5304 bytes
SHA-256: 7061d7a01cbf10768f3f318dff658296f29112fdce06b4efcc238de3996c0119
font_01_sfnt_off00005ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE9 10020 bytes
SHA-256: 73ade46de93df8d72b621cafde68d451850bcf1ee6e297c33e1fe8e63d2ea90e

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