Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a09daca25e73914…

MALICIOUS

PDF

46.4 KB Created: 2020-08-20 01:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2dbcbe7ff56e5bcf082899b2f253a802 SHA-1: dcaee18211af95168dac2782f6bb884c8ab97077 SHA-256: 3a09daca25e739140b6399ec124ed2cfa07c2239efb4fb69485a4fd6fe720c4b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the text 'Late homework pass template' and the malicious URL, suggesting a social engineering lure. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting the user to a malicious site via the embedded link.

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=late+homework+pass+template In PDF document text
    • http://files.cybelesings.com/uploads/1/3/2/7/132710632/mavupilafex.pdfIn PDF document text
    • http://files.thecostumepartyshop.com.au/uploads/1/3/1/3/131380181/sekalil.pdfIn PDF document text
    • http://files.rweirworks.com/uploads/1/3/1/6/131637108/47ddf8c9a7057.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/1/0429/8221/1735/files/fibuzutasukuzana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7062/7735/files/big_data_analytics_gtu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81579197248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4954/1013/files/wonajuzimij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/powopasotekemitifel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4973/0727/files/57049365071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6921/0773/files/timopofewul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3290/1789/files/product_business_proposal_letter_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3902/3526/files/another_day_of_sun_piano_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/tamepadas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/history_of_agricultural_extension_in_nigeria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/jovozat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4629/6985/files/30639693176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6778/2821/files/73477813573.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_off00007996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7996 5156 bytes
SHA-256: e8547c89bee2596d081d157fbfe7ea92ceea281b2c3c0abda0fe63fec5cd28a5
font_01_sfnt_off00008b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0E 9880 bytes
SHA-256: 61e770364215fab89be461974b27a95a1adb36c3401edecabdf00c576055b797

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