Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b695fe0a6000437…

MALICIOUS

PDF

49.2 KB Created: 2020-08-01 20:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcc5988423ed20e52630df4eee9b9e8b SHA-1: 2d453d1f21632f778ecbe9789e1640ec4e0f05e4 SHA-256: 1b695fe0a600043797b4e7cec6316dabdf438084f9269410cbc952e43a870c0d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that points to a redirector, which in turn leads to a PDF file hosted on Shopify. This suggests a tactic to leverage SEO for distributing malicious content or phishing lures.

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.ru/pify?keyword=acs+inorganic+chemistry+study+guide+pdf In PDF document text
    • http://files.businessrescuene.com/uploads/1/3/1/4/131482954/xaguneperuda-puwejonawup-kugokiwadim-petiwabuvinemet.pdfIn PDF document text
    • http://files.greenwithenvyintdec.net/uploads/1/3/1/3/131381881/dalanuromomip.pdfIn PDF document text
    • http://files.noelmolloyart.com/uploads/1/3/2/7/132740343/143ff8a406.pdfIn PDF document text
    • http://files.calvarybaptistseymour.org/uploads/1/3/0/7/130776001/pagudez.pdfIn PDF document text
    • http://files.roxieriverawriter.com/uploads/1/3/1/3/131378771/ripib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2846/3271/files/wimixurotosawoxudopelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/sajeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36103472339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6568/8743/files/xawatad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fisebupujavilugux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/wuxamimem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3986/7559/files/natazezenumufujedapez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4228/2399/files/4901643539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/jizuwavupokofubalejexef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6693/1865/files/95788055858.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a45.bin
5a1452be02d66d67a406c555e12e7f512546517171a2ce4b710f533204105731		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A45 5512 bytes
font_01_sfnt_off00007cd4.bin
45737c2be972bc93997ab92efc0726fb7b8a42dea0d18f5031295b127025f001		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD4 14360 bytes
font_02_sfnt_off0000a9a7.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A7 4324 bytes

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