Malicious PDF — malware analysis report

Static analysis result for SHA-256 922a1a8c3fb9a1fd…

MALICIOUS

PDF

44.7 KB Created: 2020-08-22 00:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f2e8e4a15290a0fa2b02a0b2cc2938d2 SHA-1: b3cb6dd88df3f51fe04e787a0b0aad1162a46a8c SHA-256: 922a1a8c3fb9a1fd9a8d06317e9a6593126112efab173c02518aa17a16ff69c9
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 identifying a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Jungle animal coloring pages pdf' and includes the malicious URL. This suggests a lure to a site that likely hosts further malicious content or exploits. The ML classifier strongly supports the malicious nature of this PDF.

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=jungle+animal+coloring+pages+pdf In PDF document text
    • http://files.pottingwithpotter.com/uploads/1/3/0/7/130775249/susetevik.pdfIn PDF document text
    • http://files.savoyfoundation-usa.org/uploads/1/3/1/3/131379719/subiza.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/1/0434/2674/2421/files/82728632734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7686/8504/files/gnese_allan_kardec.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6461/9171/files/transpose_list_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/18127818018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1945/9998/files/zovijojanalufasapizepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/34663922887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/antigenic_shift_and_drift_of_influenza_virus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rimudunibodosugesujusuvud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/webimotene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/alcatel_one_touch_pop_c5_firmware.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/wifumobovixuxutogonusetum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/4142289632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5344/9367/files/piluseserunetubivofulela.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_off000065e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E9 5464 bytes
SHA-256: 3624d1d206f9555233a0ee1001d95398d4412f7f9240538d9008e0eb311cf7de
font_01_sfnt_off00007860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7860 14504 bytes
SHA-256: b16c5c68da5b5ad1e0b81202befbcf44a7a62f69140864320334beee5bb850de

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