Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9e637ff7ae0fb7…

MALICIOUS

PDF

44.5 KB Created: 2020-08-15 02:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e4f10fdf4e46a14e912724621f94d541 SHA-1: 7fa8d9e243c207a6282bfa0f9fbd511d5c84ffcb SHA-256: ce9e637ff7ae0fb70bc4804b3baac31de08ea0a45600fe3838f5f4fe2f523d66
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=discovery+education+exploration+student+worksheet+dna+answers`. This URL is embedded within the document body, suggesting a social engineering lure to trick users into clicking it. The ML classifier also strongly indicated maliciousness. The PDF structure and embedded links suggest it's part of a link farm designed to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=discovery+education+exploration+student+worksheet+dna+answers In PDF document text
    • http://files.rusticocuisinetx.com/uploads/1/3/1/4/131437380/pevipuzetugiz-fudujiluxo-bonap-muzujorumakufow.pdfIn PDF document text
    • http://mosen.teachoneacademy.org/uploads/1/3/0/7/130740086/witipazuluxabanok.pdfIn PDF document text
    • http://rexiv.socratessolano.com/uploads/1/3/1/4/131453494/3585935.pdfIn PDF document text
    • http://files.theweeklybeaver.com/uploads/1/3/0/8/130814513/wonoperixujuv.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/1/0431/2013/2247/files/bukukufejizet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8647/8489/files/child_immunization_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2206/3515/files/92481716529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/42132015011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6493/3014/files/wefobunadibija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/1191/9271/files/47027441927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/cahier_de_charge_maintenance_informatique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/70405268318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/dimurexidufolevijafolito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/kanubumulefilubidomose.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECE 5544 bytes
SHA-256: ce9da6d98adc211fd7f791ce11844dc5b787771d85a904d5e301a58d4df47d6f
font_01_sfnt_off000081c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C2 10088 bytes
SHA-256: dba0bb885a5303c8e13c431fbb0656e3d3465518fd11730ddb6f0f99893ae471

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