Malicious PDF — malware analysis report

Static analysis result for SHA-256 68118f3b0a0e22df…

MALICIOUS

PDF

56.3 KB Created: 2020-08-03 04:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f54cbc951edbdb23d997ed1aace50fd SHA-1: f5d87b64c9d9e5d9c873654dea84d27358cacc59 SHA-256: 68118f3b0a0e22dfb268003ae42a5a1f546fbfd5179374136e0d564b322742f5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external PDF files, disguised as a solutions manual, which is a common lure for SEO-based phishing campaigns. The primary link directs to a redirector URL, indicating an attempt to obscure the final malicious destination and potentially track user engagement. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

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=schroeder+thermal+physics+solutions+manual+pdf In PDF document text
    • http://files.wakingupwilder.com/uploads/1/3/1/4/131453998/suzesu.pdfIn PDF document text
    • http://files.jona-music.com/uploads/1/3/1/4/131452858/3533253.pdfIn PDF document text
    • http://wusoxowo.highergroundrooftopfarm.com/uploads/1/3/1/6/131607712/89ff10c127ad86.pdfIn PDF document text
    • http://files.socalpengathering.com/uploads/1/3/1/4/131453018/9479338.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/1/0432/9707/9460/files/roriwataf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/44970544970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1828/8284/files/husqvarna_yta22v46_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6577/8076/files/fibonacci_series_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4843/4840/files/w3_schools_jquery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/67386720602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1644/3288/files/cardcaptor_sakura_wallpaper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/vamixijiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7437/8142/files/91788354121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3796/5986/files/newujotologuvize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5042/5750/files/winog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/bironokakefugofonap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5283/3687/files/kofen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1A 10836 bytes
SHA-256: 3955d689fad21e3db95f46c20834264ce741605b4e6ea050960c6a3e0ffd9a50
font_01_sfnt_off00009ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE1 5600 bytes
SHA-256: fa2a892d761a79507eb3869bd4f449c55a176195a62bbbc4704de3296dca1e3b
font_02_sfnt_off0000adc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC7 11136 bytes
SHA-256: fa7c34d59509b150068062e299da0eaec48a4524be1f4ceb047e781aafded3e3

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