Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e3208b7047faee…

MALICIOUS

PDF

51.0 KB Created: 2020-07-30 01:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0bbda6d1bdef38d48db12e2ebd5782a4 SHA-1: ba1baaaa3a0530196699f894fcc4887c33851800 SHA-256: 19e3208b7047faeecbe242284becfeade54aa74e1eb08c10a96db1c75781a44e
202 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'data structures and algorithms notes'. The presence of a 'download button' heuristic further supports the malicious intent of directing users to external resources. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=data+structures+and+algorithms+anna+university+notes+pdf In PDF document text
    • http://files.tous-droits-reserves.com/uploads/1/3/0/7/130739298/sonozuzalakulozite.pdfIn PDF document text
    • http://files.graffitiwgratitude.com/uploads/1/3/0/7/130738814/808e7b1556b9ad.pdfIn PDF document text
    • http://files.automobiliabybuck.com/uploads/1/3/1/8/131859895/jevetutoleko.pdfIn PDF document text
    • http://files.greateraustinsws.com/uploads/1/3/1/4/131406173/laxobox.pdfIn PDF document text
    • http://files.cityoflathrop.org/uploads/1/3/1/4/131408169/livanowugokizof_jegasekujuzigu_nilibasagedale.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/1/0431/1541/3661/files/laxegeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5884/0223/files/40625915821.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0508/2776/files/42417334019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7518/2485/files/11433560142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/87416683959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/41448091960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1284/8790/files/54391747983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/38518250220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F13 5612 bytes
SHA-256: d9ef29f5ff11cb44860acf2372fca992661a803caef58b1d798ee339f530b6cf
font_01_sfnt_off00008201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8201 2116 bytes
SHA-256: 49f1c345582212729590e0456707ca92d3838aef8cba26fbcaa28f8c5b0a0640
font_02_sfnt_off00008bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCC 15076 bytes
SHA-256: b976d4b2e6e6224328dbd59a0c1ad6ffcb40c02297dd3cdbf2618458a8d3544c

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