Malicious PDF — malware analysis report

Static analysis result for SHA-256 58af077a92b0e67f…

MALICIOUS

PDF

49.0 KB Created: 2020-07-30 22:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c347551b53665d3c5741afdd313fbe81 SHA-1: 70e9afced23b5ecf814494aeb141391561362f4b SHA-256: 58af077a92b0e67f8cb20a92d60bcb3f2f79ff5dbc632ecb8a7337404b6689d0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, `https://ttraff.com/pify?keyword=operations+supply+chain+management+jacobs+pdf`, is flagged as a malicious redirector. The document body is heavily obfuscated, but the presence of these links strongly suggests a malicious intent to redirect users to harmful content. No scripts were extracted, limiting further analysis of execution chains.

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=operations+supply+chain+management+jacobs+pdf
    • http://files.baltimorebotanicals.com/uploads/1/3/2/6/132696174/madimif.pdf
    • http://files.owostyles.com/uploads/1/3/0/7/130776326/1927490.pdf
    • http://files.deanmelbourne.com/uploads/1/3/1/0/131070590/vobaku.pdf
    • http://files.naturaltreatmentbackpain.com/uploads/1/3/1/3/131380052/tokil.pdf
    • http://files.naturaltreatmentbackpain.com/uploa
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/17382120454.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0336/files/mivatil.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/81771213788.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1278/files/pexelelirozexosizibodikef.pdf
    • https://cdn.shopify.com/s/files/1/0441/0900/4952/files/lepeke.pdf
    • https://cdn.shopify.com/s/files/1/0441/0372/9304/files/27892181650.pdf
    • https://cdn.shopify.com/s/files/1/0431/4470/8245/files/38725054670.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/mekas.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7484/files/zexex.pdf
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/90141160001.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/52088558513.pdf
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/83308058840.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/15361486892.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_off00007e4d.bin
b98f0a9a6ba58284e88fcf631a1c61f3abc2cccaf3a8720b62f7dcfb45ec6e60
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4D 5796 bytes
font_01_sfnt_off000091d8.bin
0c1e377ba3f59445570ce0d535c6c19389baf7fff024ccfb425cb38ae444ae48
pdf-font-stream PDF embedded font (sfnt) at offset 0x91D8 10620 bytes