Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c682790fbb35737…

MALICIOUS

PDF

43.2 KB Created: 2020-08-13 00:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80f2fa9a62e777749088d280458c298b SHA-1: 9613a353d33eb79319199dc0eaa9be3ad8ec1289 SHA-256: 1c682790fbb357371ee5a529d6d91f495799362473a1be3308959e0e9e9d59ee
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 an attempt to drive traffic to potentially harmful content. The document body, though heavily obfuscated, contains text related to 'academic writing answer key pdf free download' and the malicious URL, suggesting a lure for users seeking such content. The presence of a visual download button further supports the deceptive nature of the document. The primary malicious IOC is the redirector URL which likely leads to further malicious content.

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.cc/pify?keyword=academic+writing+answer+key+pdf+free+download In PDF document text
    • http://files.cyclingadventures.net/uploads/1/3/2/6/132695689/sulexovabub_bubizelogu_mekodovi_pinuvawenun.pdfIn PDF document text
    • http://durezom.ginkgopress.com/uploads/1/3/0/7/130776023/3361233.pdfIn PDF document text
    • http://files.young-knives.co.uk/uploads/1/3/1/0/131071035/8499a0c51ee1.pdfIn PDF document text
    • http://wazura.abbyvasek.com/uploads/1/3/2/7/132712207/logotigifu-nakolibozu.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/1/0431/2137/7434/files/25914187913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6405/0332/files/canon_rebel_sl1_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2274/4741/files/26829382324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/6466/7810/files/water_hammer_in_pipeline_systems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0486/2374/files/selozegijovugalidekuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/41617673772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1721/5905/files/49054839257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/entrepreneurship_in_philippine_setting_for_senior_high_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/fokerizebaborulobetoxifuj.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_off0000681c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681C 5720 bytes
SHA-256: ddabc6efa35c18c3d894efd79f16b8257ad52e9e3349b21d3b399ab3c1f8f836
font_01_sfnt_off00007b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9C 10756 bytes
SHA-256: e12be04295cfb7dcf3d6f9f505babc910d2e39d5dde03df0d5f319fc96c1e5ff

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