Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b38d115778b01d1…

MALICIOUS

PDF

42.6 KB Created: 2020-08-21 20:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a78a70a1e3f0faf349966e793f485433 SHA-1: d0640a4ebec09bc94d1b1e849b42b8b6b0cdd759 SHA-256: 1b38d115778b01d18e6fe7497864b85822fc093dc1531b8ecd4f32faf10108a7
202 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or redirection attempt. The document body text, though partially corrupted, includes phrases like 'Ma admission form pune university' and a call-to-action phrase, suggesting a lure to trick users into clicking the malicious link. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further stages of an attack.

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=ma+admission+form+pune+university In PDF document text
    • http://wolan.kirstenpowell.com/uploads/1/3/1/8/131858530/0ff29708986b6.pdfIn PDF document text
    • http://files.colaisteanchraoibhin.com/uploads/1/3/1/4/131452878/f75cf48b.pdfIn PDF document text
    • http://files.easel-lab-mondal.com/uploads/1/3/1/3/131380592/xokisenozu.pdfIn PDF document text
    • http://fuberesam.schwarzgoldce.org/uploads/1/3/1/0/131070374/54d0043117ae.pdfIn PDF document text
    • http://files.texasmlsbroker.com/uploads/1/3/0/9/130969158/05e32b.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/1/0428/3082/3583/files/addressing_modes_of_8085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/basic_english_assessment_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2832/4257/files/vewuferozikad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3964/5093/files/98575024417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libuzab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/gogizaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/poliwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/aspersores_para_riego_agricola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/reference_evapotranspiration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/28571531003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4118/6215/files/bifesomufufidomuguwotepu.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_off00006638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6638 5320 bytes
SHA-256: 0b17be4b7288cfe07c32216885093836188ac7d73dc6072d4e09b2c6147beb6b
font_01_sfnt_off0000784f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x784F 10452 bytes
SHA-256: 25b1f8f6bee202e46a8dfc1f102105bc88093a9dff2badbe7540982ae3c82c14

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