Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fbf819f2ab9f3c0…

MALICIOUS

PDF

47.2 KB Created: 2020-08-09 23:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 412c1d0122d2f41a83358f35c24767ef SHA-1: 106541e2aafc1c8481155284082f78b25e5d2d58 SHA-256: 4fbf819f2ab9f3c0dc5535e7007736c976019061da0d7b9936da5ef1a078e640
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to electrical equipment and the tool 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting users to malicious sites through a link farm.

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=choix+appareillage+electrique+pdf
    • http://bolekagi.visitdvcc.org/uploads/1/3/1/0/131069934/golijowowade.pdf
    • http://files.joshuaganger.com/uploads/1/3/1/3/131384489/tiximavoxiwivawumi.pdf
    • http://files.sanjosecommunity.com/uploads/1/3/1/6/131606694/513414.pdf
    • http://xamegopu.austinsbestphotobooths.com/uploads/1/3/1/6/131606407/a60bbd.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/2681418700.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/batomolisigarem.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/panufupiwiledukubafin.pdf
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/81829302776.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6217/files/john_deere_1070_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/8170/2301/files/53392457549.pdf
    • https://cdn.shopify.com/s/files/1/0437/7565/6094/files/peximuxebowizurif.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/767816103.pdf
    • https://cdn.shopify.com/s/files/1/0435/6331/9445/files/xujifaragikironotiritevig.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/69732474954.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/piano_arpeggio_practice.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4097/files/20216177075.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_off00006987.bin
1f83325035fb64fa5b06659c1e81ed62a89cd6fbaa86e942df9fae8f4eeac419
pdf-font-stream PDF embedded font (sfnt) at offset 0x6987 5232 bytes
font_01_sfnt_off00007b6f.bin
0b38468529bb8d640f57493abb64e9ef2e23cee7d347fdec7b9807241eb659c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6F 11624 bytes
font_02_sfnt_off00009fda.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDA 4324 bytes