Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7102f208890920…

MALICIOUS

PDF

45.0 KB Created: 2020-10-24 09:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 54f775b4e016d2220baf6059ce605ced SHA-1: 1b6b03f5e0b7cf7d84b6bf5cc8172694f393e83d SHA-256: 9b7102f208890920d26b356efd9a2759a40c9a80dad6a74897e4ad8f00e18ba0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify and Weebly domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'fittonia plant care instructions' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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://gettraff.ru/123?keyword=fittonia+plant+care+instructions In PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/rogatotatasavox.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/8967434.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/8220036.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/1/0477/8603/3311/files/writing_fractions_as_decimals_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4646/1855/files/demuwogeniwugal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1358/5047/files/scan_file_b_ngc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/vugomakotafelufugonufopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f688cd9-f701-4212-9c1c-7ac2125cc912/58235182961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e44a5ebc-f1cb-4e85-9ad8-8ffee1675f45/54613282510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b914288-1c61-4056-8fc8-b86df1f07abb/ford_f250_manual_transmission_proble.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3237/5207/files/84855419106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0540/6115/files/electricity_and_magnetism_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35dc4d88-b281-42ec-bd53-482ede7db3e4/72238212377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26297e3e-974e-4b7b-b0f8-7d4cb9209a37/48222738721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/174a19f7-38fa-4173-9c75-c1d31131977b/71303217930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8881/3461/files/63377212592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2948/6505/files/widoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1411/7293/files/coffee_grinder_manual_uk.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_off00007262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7262 4884 bytes
SHA-256: 0025db38044555f815216b0e49504717faef346cbfc43ea7c6c01a371acf4c5a
font_01_sfnt_off00008309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8309 10712 bytes
SHA-256: f411f793a9a06b6b0b01f38a40a806cc962919887fde5913d619b628394cf182

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