Malicious PDF — malware analysis report

Static analysis result for SHA-256 41dd63099ff81c9c…

MALICIOUS

PDF

38.2 KB Created: 2020-11-02 05:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a69f422590a91c8d06b198f0d196ab8d SHA-1: 924faf139139ffec92f21c9014cfc81a70d7f39f SHA-256: 41dd63099ff81c9c2b13353c975b37b1fb7cf3aba309eb0e3028a345f8e98f62
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure for a 'Sonicare rebate form 2020' and embeds multiple links. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.link/123?keyword=sonicare+rebate+form+2020', which is designed to lead users to malicious content. The presence of numerous other PDF links suggests a link farm or SEO manipulation tactic. No scripts were extracted, but the embedded links are the primary attack vector.

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.link/123?keyword=sonicare+rebate+form+2020 In PDF document text
    • https://nixejovebomir.weebly.com/uploads/1/3/1/3/131380485/107c71.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/3851604.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/5003d5cbc57e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tadovu/72143468205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9553/1424/files/99692245381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1274/9469/files/57033629251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/8338/7842/files/75138036149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5013/8261/files/roblox_robux_generator_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/9265/3234/files/178643621.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/dufopenazukamuzojuxez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8913/9614/files/30404471907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6134/4406/files/logout_wifi_id_gagal_di_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D1F 5336 bytes
SHA-256: 4c6a693ba3fdd4ed3daee5cec97b570af01d205a17a5b4372eb80ff2c94f705f
font_01_sfnt_off00005f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2E 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000067bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67BC 10628 bytes
SHA-256: 739f318de468faa32d0aba53fd0ed679c4183607fced20219cb867b9943961d2

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