Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd1cd9c46514626…

MALICIOUS

PDF

56.1 KB Created: 2020-08-07 23:36:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96048d46a6637e9d9b1e251ffd3f88c8 SHA-1: 0cbd9d77e2d6736a4981c7ab7e2168d0d601931a SHA-256: 8fd1cd9c4651462649dacecddbb6bbb6fea2d48b1719ea55180e7b099cc2ceed
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to what appears to be a link farm designed for SEO manipulation. One of the primary links, 'https://ttraff.ru/pify?keyword=palabras+basicas+en+ingles+pdf', is flagged as malicious. The document body, though containing garbled text, also includes this malicious URL, suggesting a lure to a potentially harmful site.

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=palabras+basicas+en+ingles+pdf
    • http://files.seeandbekitchen.com/uploads/1/3/1/3/131379213/tiporidikogi.pdf
    • http://files.vapmedia.com/uploads/1/3/1/0/131071290/nawagorutagaju.pdf
    • http://labifar.montanaarabianhorses.com/uploads/1/3/0/7/130776542/790b04.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/51259288443.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/54073370203.pdf
    • https://cdn.shopify.com/s/files/1/0435/6587/5359/files/76353796671.pdf
    • https://cdn.shopify.com/s/files/1/0439/9392/3742/files/fanofuturupipiluweba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bovabokuvuxinapuwukiberem.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/sozarupaforexuvikonetun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0812/2270/files/43584693007.pdf
    • https://cdn.shopify.com/s/files/1/0431/0509/1745/files/25303219533.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7472/files/17169209683.pdf
    • https://cdn.shopify.com/s/files/1/0434/5482/4598/files/71360756929.pdf
    • https://cdn.shopify.com/s/files/1/0433/7208/5406/files/milarekemudij.pdf
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/41654207209.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_off00008268.bin
c7063a9e79db4e14ed03f2770908964bddd144562f64a73cd5925cf75a28bc32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8268 5064 bytes
font_01_sfnt_off00009391.bin
5fc75c9000ec16dda5bffca278e3b1425a6905a52e4f315c663db8c63bdf6b57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9391 15920 bytes
font_02_sfnt_off0000c361.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC361 4324 bytes

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