Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5f36ec2142d3a0…

MALICIOUS

PDF

48.1 KB Created: 2020-08-07 00:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efa1140801a5e2663e00ffcf7d13f8a9 SHA-1: dd6f5a6c30461724fef3339adca6bbdb2ce0760e SHA-256: 2b5f36ec2142d3a009b5bcafbc67e1f9dc8334c307d3f2d4f1c2b38b12e8360c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing for a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=fusionner+fichier+avec+pdf+creator'. Another critical heuristic indicates a link farm, with many links pointing to Shopify domains, likely for SEO poisoning or to host further malicious content. The ML classifier strongly flagged this PDF as malicious. The document body contains garbled text but includes the same redirector URL, suggesting a lure to a malicious site.

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=fusionner+fichier+avec+pdf+creator
    • http://files.didymus.org/uploads/1/3/0/8/130873787/8319775.pdf
    • http://files.chriskernutt.com/uploads/1/3/0/9/130969885/lixuwedujafedepoxidu.pdf
    • http://files.yogameditationdangers.com/uploads/1/3/2/7/132712407/7560755.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/ditisiraz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1316/8542/files/94355782853.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0964/files/b_emoji_alt_code.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/priscilla_shirer_bible_studies.pdf
    • https://cdn.shopify.com/s/files/1/0433/8365/2506/files/91228047034.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5241/files/94606139428.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/37190587426.pdf
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/85575619809.pdf
    • https://cdn.shopify.com/s/files/1/0437/6359/7473/files/deradicalizing_the_romanceless.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/53229957639.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/jorolipezubenuza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/49099457011.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dcb.bin
8bf2c133934aac97375ea353b5c6ea6a89b54959786684085f9f897c8ec84010		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCB 5108 bytes
font_01_sfnt_off00007f2a.bin
d2b854596740256d2359bc9991ff11568f2bc539b554524dedc62138e01d5f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2A 11752 bytes
font_02_sfnt_off0000a3c0.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C0 4324 bytes

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