Malicious PDF — malware analysis report

Static analysis result for SHA-256 0970de22f855cf8d…

MALICIOUS

PDF

51.5 KB Created: 2020-08-24 06:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17bca4ecf3227ac4265ca4ccf193c3b8 SHA-1: fbeff4b622772a2e3180d50aad23b36d4c59b1db SHA-256: 0970de22f855cf8dfb7f3f1d5855c11a7a0a222bf7cd22d24bceca8469b3b093
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or spam campaign. It also hosts a large number of external PDF links, suggesting SEO manipulation. While no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to drive traffic to malicious sites or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=photoshop+photo+gallery+templates
    • http://nusude.operationrv.com/uploads/1/3/0/7/130776031/063e76b9d.pdf
    • http://pafubesel.alexandrahaleyart.com/uploads/1/3/0/8/130874679/2381894.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/tubirafadipegufivumujifin.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5079/files/suzavuvukibofaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4965/files/sikezufipi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7241/2055/files/belapur_housing.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/91715916491.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0610/files/siwenukexox.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/64980272868.pdf
    • https://cdn.shopify.com/s/files/1/0460/3992/4900/files/free_action_movies_full.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/63919413166.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/66090581552.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/prioritization_delegation_and_assignment.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/88987925705.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f2f.bin
1a71577eba21e75493e7846505b73b6b7146ac46ae8b6a28720f17620c12d71e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2F 4968 bytes
font_01_sfnt_off0000901f.bin
d4d3eb8b94ca0a3b56fde6204599ec86b3696023d131041a838fa91f2785d922		 pdf-font-stream PDF embedded font (sfnt) at offset 0x901F 10044 bytes
font_02_sfnt_off0000b276.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB276 4324 bytes

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