Malicious PDF — malware analysis report

Static analysis result for SHA-256 add2e79bff21b011…

MALICIOUS

PDF

59.1 KB Created: 2020-08-03 12:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4ea372b8966fd56add63da61f181c21 SHA-1: 2da4f828b9434bb1163062fcb6ddceed0215973a SHA-256: add2e79bff21b0110ae1625288dde8b37151daece3942a791afeb170cd8318ae
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, aiming to trick users into clicking it. The document body, though heavily obfuscated, contains the primary malicious URL. The PDF also hosts a link farm of other PDFs, likely for SEO poisoning or to obscure the malicious redirector.

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.com/wb?keyword=floorplanner%20editor%20manual In PDF document text
    • http://moniwexi.hendrickscountymrc.org/uploads/1/3/1/3/131383283/noxepa.pdfIn PDF document text
    • http://files.pelevenart.com/uploads/1/3/1/6/131606819/5722751.pdfIn PDF document text
    • http://vobad.destinationwest.org/uploads/1/3/1/3/131379246/bigufefenodita.pdfIn PDF document text
    • http://files.kickitcancer.org/uploads/1/3/1/3/131397971/19b8b8146.pdfIn PDF document text
    • http://files.booksatafifth.com/uploads/1/3/0/7/130776575/xufupujixofawo_sefege_pukarepizav_jeguratul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/jadasinuxiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/last_resort_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6158/3776/files/89950661277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6869/4423/files/43597060899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/0389/9048/files/oxford_ib_biology_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1094/9273/files/42386856485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1887/8114/files/breck_snow_stake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/61263126088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rerotapok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7258/4861/files/university_physics_14th_edition_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7987/4213/files/73965098673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/kavafinuvesipizini.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
🗂 Part of campaign: booksatafifth.com 3 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED4 4764 bytes
SHA-256: 650024bbe597087a931b7df834029b895ae87e6885aae562f416042bcac33a61
font_01_sfnt_off0000aed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAED9 10060 bytes
SHA-256: 8656a39be6921802669ef15dac376906c29a8653e79c9c54735c1345c888d617
font_02_sfnt_off0000d147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD147 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c