Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1078aabcda498c4…

MALICIOUS

PDF

40.3 KB Created: 2020-07-31 19:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 82c350b1ec7e94f6fe6ed2a3a68781a4 SHA-1: f4668b9856694a5847a7c10cf148f1360724aa8a SHA-256: b1078aabcda498c4a1e65183c0da96b7760a65c7b7e1d883c03463fd480ba504
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 for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Arraylist implementation in java' and includes the malicious URL. This suggests an attempt to disguise malicious content within a seemingly technical document, likely for SEO manipulation or to trick users into visiting a harmful site.

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=arraylist+implementation+in+java In PDF document text
    • http://files.tiftcountyshowchoirs.com/uploads/1/3/1/4/131407547/ruzusafetizixewira.pdfIn PDF document text
    • http://files.iscypaa.org/uploads/1/3/1/4/131406701/dalov-redanas.pdfIn PDF document text
    • http://files.tacalliancedistributors.com/uploads/1/3/2/8/132815791/wezixagipofevulikuja.pdfIn PDF document text
    • http://files.ksasteel.com/uploads/1/3/0/7/130739525/wuruvinu.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/1/0428/7243/8947/files/gewiwaroluli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95909873105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/61606847551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/dubobolijidideribebiniwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/61484968463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7691/9194/files/38406127864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5077/9295/files/mejanijadepeniresonota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/xaniv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5591/2862/files/vobewegabopiviwapopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/kixopulufuwabuvugaden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7259/3825/files/14893167530.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_off00005ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBE 5192 bytes
SHA-256: b2831aaff43a0f366db0736b95776d80c7fe409006707a6cb409e2d5780d7ac7
font_01_sfnt_off00007064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7064 10996 bytes
SHA-256: 8a45f921f3460e646e1e2056f874ceb6b86b4357067cce0a94c97595f79fc859

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