Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c5e02ad673e52ac…

MALICIOUS

PDF

41.2 KB Created: 2020-08-12 03:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79ab54ed85a7b8fabf256d2666cd4bb5 SHA-1: 656b3d06ecb3ea89c3ad33d5a565fac7f2de8fae SHA-256: 3c5e02ad673e52acbb3e2cb5f6e0d945c643423861e3eed2c58096c8ed118964
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary link, 'https://ttraff.ru/pify?keyword=buku+cerita+anak+pdf+gratis', is flagged as malicious. This suggests a phishing or social engineering attack where the document is used to distribute malicious links. No scripts were extracted, but the PDF structure and link farm indicate a delivery mechanism for further compromise.

Heuristics 3

  • 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.
  • 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=buku+cerita+anak+pdf+gratis
    • http://webedubo.9lazy3leather.com/uploads/1/3/1/6/131606289/12c023c61.pdf
    • http://sekama.vividpk.com/uploads/1/3/2/3/132302780/mewixanisoxo.pdf
    • http://pesoxaxa.salishfysprt.org/uploads/1/3/0/7/130775085/6703957.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/honeywell_temperature_controller.pdf
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/xibagegojidugo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5497/3606/files/wadat.pdf
    • https://cdn.shopify.com/s/files/1/0434/0390/3127/files/xolitasitunemaxuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/6400/7583/files/24499358022.pdf
    • https://cdn.shopify.com/s/files/1/0430/4162/0119/files/bhagwat_geeta_book_in_gujarati_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/marotubiguxipebuxares.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/encyclopedia_of_dog_breeds_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0451/6030/0698/files/pathophysiology_of_congestive_heart_failure.pdf
    • https://cdn.shopify.com/s/files/1/0451/6714/9210/files/general_zoology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/28626633028.pdf
    • https://cdn.shopify.com/s/files/1/0433/2532/5467/files/banwell_mccash_spectroscopy.pdf
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/63824928537.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000646a.bin
d99322ce40c58ef5d4658fdaa45af8dcf6628a18fa6b7cec0c85a786bd20a426		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646A 5404 bytes
font_01_sfnt_off000076e0.bin
f1941c2624b391732bb407ad537b9c2da58bf6fd6f59cda5e66ceff11034410d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E0 9596 bytes

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