Malicious PDF — malware analysis report

Static analysis result for SHA-256 222796721cc59965…

MALICIOUS

PDF

47.3 KB Created: 2020-08-21 07:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8001321615b55732ed84cbc69075a56 SHA-1: 53bab7c9188681e533b3c145e3efeef55fd8b79d SHA-256: 222796721cc5996571a6c3bf57f98b73625204a55ea15bb78cd066d464f4d839
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 indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is an 'answer key' for an exam, aligning with a lure to trick users into clicking the malicious link. 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 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=answer+key+mpsc+2019+combine+pre In PDF document text
    • http://files.goodlifedaily.org/uploads/1/3/1/4/131408899/0651af0.pdfIn PDF document text
    • http://files.juliewilder.net/uploads/1/3/1/4/131483830/3147075.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/congenital_heart_disease_causes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/sagilaxabeweresever.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9752/1317/files/delhi_metro_map_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5872/5015/files/soxugiromukavufadinax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/dispute_debt_collector_credit_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/99051224273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/guiame_espiritu_santo_stormie_omartian.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/69710543374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4405/1871/files/ksrtc_internship_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8375/0821/files/gta_5_cheats_pc_cars.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 3

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_off00005a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A71 5704 bytes
SHA-256: 4d8fcae91931aa4c900f600163a48f91591714d6799e68d78635ce0b9b6a6494
font_01_sfnt_off00006dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDE 9708 bytes
SHA-256: 829aa343e1729b416f13b11e333a65d6111b3692a8383d5add5b0fa976135024
font_02_sfnt_off00008f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F62 9936 bytes
SHA-256: a2c4b5fd43d4912e6d3f31f4ae8916b77f94a465ae5e6a5475d1fcb704229908

Open this report in the interactive analyzer, or submit your own file for analysis.