Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a6c391b29a3c342…

MALICIOUS

PDF

51.7 KB Created: 2020-08-08 08:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21d3ccd10883449d00c5908bcd85f7dd SHA-1: 68b12b0a440734fa37eb8c16a3bae2faadc7bc65 SHA-256: 1a6c391b29a3c342e40112e71cf27d81ecc8a65ec44b792b6b33714717c1b07c
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm, with numerous links pointing to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic. This suggests the primary goal is to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Heuristics 4

  • 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
  • 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=advantages+of+multilingualism+pdf
    • http://files.mrsstoddardsiewclasses.com/uploads/1/3/1/4/131437657/1677181.pdf
    • http://files.lucynthiaent.com/uploads/1/3/0/7/130775998/8e47c71379c1.pdf
    • http://files.fridayflyfishing.com/uploads/1/3/1/4/131437402/guvis.pdf
    • https://cdn.shop
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/form_ssa-_521.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/85754455125.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/dofirenosololezijakiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/4704/9621/files/cantares_mexicanos_miguel_leon_portilla.pdf
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/sivevigukew.pdf
    • https://cdn.shopify.com/s/files/1/0431/5349/0071/files/wobufifazidimajuralabe.pdf
    • https://cdn.shopify.com/s/files/1/0440/3478/5430/files/lukatofujusutaluwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7347/8560/files/32495349487.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/jixegakawinomonesovoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/65322422222.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_off00008144.bin
826032a56f71d17188d8a7ccb3bc4306dcdbd9f78fe92e39c56378239b16b827
pdf-font-stream PDF embedded font (sfnt) at offset 0x8144 5312 bytes
font_01_sfnt_off0000934f.bin
6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x934F 1800 bytes
font_02_sfnt_off00009bdf.bin
a0b420960d7f0ce26a49d9838245360faea8ec9d52d60331cdaa2850cc2716fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BDF 11156 bytes