Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e99b1f7cb0ef50…

MALICIOUS

PDF

44.5 KB Created: 2020-08-13 23:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2ff8b7e11552973b077a351846d2e82 SHA-1: fee5ba7672f157bc1f01e72d2e904791ae1c2c3c SHA-256: e3e99b1f7cb0ef500731fb05307c5c798b6df7c9c9c23d624512090097da0ef4
150 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 link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious domain (ttraff.com). The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=online+video+converter+to+mp4+android', suggesting a lure to disguise malicious activity as a video conversion tool. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=online+video+converter+to+mp4+android
    • http://files.tradezonewestport.com/uploads/1/3/1/3/131380942/nomefom.pdf
    • http://metexaxe.unwinedonwhite.com/uploads/1/3/0/7/130739826/jesuzenoboxusaxagu.pdf
    • http://peviwu.innatelyhealed.com/uploads/1/3/2/6/132695663/nugojuf.pdf
    • http://files.ballisticstrength.ca/uploads/1/3/0/9/130968933/bapafezonafuwapogobe.pdf
    • http://sudopuz.roommaker.ca/uploads/1/3/0/7/130776542/5527175.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xokuwunojuvilil.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/mailchimp_button_modal_popup.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/puvejonino.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4160/files/biraseguwogekerime.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/xebakekoxirapalovu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/82311722025.pdf
    • https://cdn.shopify.com/s/files/1/0432/1391/4276/files/asterix_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/88455853387.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8333/files/gasivijik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/affaire_de_coeur_danielle_steel.pdf
    • https://cdn.shopify.com/s/files/1/0429/4528/2214/files/befugotekakajigok.pdf
    • https://cdn.shopify.com/s/files/1/0433/8008/0801/files/bypass_gastrico_en_y_de_roux.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_off00007071.bin
d795c6ad5c9e1a05aa10aeb4182f73fc747a312be44fb91f7e847517331a2256
pdf-font-stream PDF embedded font (sfnt) at offset 0x7071 5216 bytes
font_01_sfnt_off0000821f.bin
1cab3a8ff33c39a13a195f4118b3ed6b152c1ed4f82258536f111bc9eac9c9dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x821F 10332 bytes