Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1b6844d78ac03cf…

MALICIOUS

PDF

42.0 KB Created: 2020-08-07 19:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70d8add923a29436653182656a9521be SHA-1: b665aa5424237dbb88bd86c16e27483ea4ad4fac SHA-256: a1b6844d78ac03cf340bea1b694abb17dd16c9697926a7f3ba5852d850a09634
120 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to appear as search results for a technical manual, but the primary link redirects to a known malicious domain. This indicates a phishing or scam attempt. The document body itself is heavily obfuscated but contains the malicious URL and numerous benign-looking PDF links hosted on Shopify, likely to lend legitimacy to the overall lure. No scripts were extracted from this sample.

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/wb?keyword=fluke%205500a%20calibrator%20manual
    • http://files.assisted-living-resources.com/uploads/1/3/2/8/132814942/luduvevimam.pdf
    • http://radagew.thomasstreetpharmacy.com/uploads/1/3/1/0/131070161/kitatabubigerubuju.pdf
    • http://files.whitegallowaysofwayby.com/uploads/1/3/0/8/130873907/fewubogukobavel-sixomolimu-mifip.pdf
    • http://files.onebookonelife.com/uploads/1/3/0/7/130775992/ff50756ea81784.pdf
    • http://files.refugees-hist-366.org/uploads/1/3/2/7/132710491/3496221.pdf
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/92509655153.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/39861341667.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/nabidawodo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6993/1673/files/2540814988.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9667/files/81966998856.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/21780448627.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/php_case_statement.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/wupogofemamevimeve.pdf
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/serenevutumujutogavuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6833/files/77570706862.pdf
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/guxili.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_off00006419.bin
481942224d962773352d48ef92acc0bc5b7b0e30090558250c15b63e59b0c51d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6419 5192 bytes
font_01_sfnt_off000075b6.bin
1bde1a22c907727ffa50cbbd34572df81d087e77955dc97f355d028ea6fb3a0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B6 10764 bytes

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