Malicious PDF — malware analysis report

Static analysis result for SHA-256 3033dcee325888b4…

MALICIOUS

PDF

34.9 KB Created: 2020-10-31 10:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b5046c4fd4f86aa57f4e8852b9573cd9 SHA-1: bfa0c5d7581a8e53fbde1ccb17447a72f98d0497 SHA-256: 3033dcee325888b4db4ea9f91fc4626b5651a1fabd03c2c7ebfd7971eddba076
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, disguised as a free audiobook offer. This redirector likely leads to further malicious content or malware. The presence of numerous external links, including a link farm, suggests a tactic to manipulate search engine results or distribute malicious content broadly. No scripts were extracted, but the ML classifier and redirector link strongly indicate malicious intent.

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/123?keyword=rhonda+byrne+the+magic+audiobook+free In PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/e6a81a8.pdfIn PDF document text
    • https://barofabilis.weebly.com/uploads/1/3/2/7/132712093/zuwoxikulusofijuwe.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/7628721.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/pofej.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/sifawekujiki/pamisutaxuvonajut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4487/9527/files/sukukowaxisumizokufon.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/36858717582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9175/7737/files/miglior_autoradio_android_golf_6.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/bare_bones_kathy_reichs.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/24116364056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3426/1679/files/62042547297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8827/1767/files/sapebubemi.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/mapa_metro_roma_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4568/1824/files/manual_fiat_freemont_precision_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1418/8967/files/42657771330.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_off00004a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A8F 5536 bytes
SHA-256: 0f95183c14814b76371b2648de9c735ee67fb05095b96ea0bcc5c7bce67e06f9
font_01_sfnt_off00005d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4A 9952 bytes
SHA-256: fcb451cca1817b6323f632fbe5c402aa2966e9f5ecec25dcdc029cc989c0aaf0

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