Malicious PDF — malware analysis report

Static analysis result for SHA-256 b734672af382ae2c…

MALICIOUS

PDF

48.4 KB Created: 2020-08-09 07:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d2b8e5d3303069e65e2e31acc4ac39f SHA-1: 5d9b263a8bfe6c10041e4ce95549088845eed793 SHA-256: b734672af382ae2cc555dfca1674805fd513d5ac716903ef7f6dc0133911dc70
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, aiming to lure users to a malicious site. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted from this sample.

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=strength+training+exercises+pdf
    • http://files.shineskillsforlife.com/uploads/1/3/0/7/130739126/9657014.pdf
    • http://files.kinsellamitchell.com/uploads/1/3/2/6/132682639/bukisiremajibivifo.pdf
    • http://files.chimneysolutions.ie/uploads/1/3/1/4/131407655/6836620.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/79614580366.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/neo_pi_r_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/gijarinogimuxox.pdf
    • https://cdn.shopify.com/s/files/1/0447/1917/7882/files/types_of_advertising_media_and_their_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0434/3100/2264/files/xirab.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8022/files/nisuwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2310/files/a_w_tozer_the_knowledge_of_the_holy.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/49678146056.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/46745208241.pdf
    • https://cdn.shopify.com/s/files/1/0439/1868/8424/files/4806178847.pdf
    • https://cdn.shopify.com/s/files/1/0429/2096/8358/files/pradhan_mantri_awas_yojana_2020_application_form_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/pamejifin.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_off00007ef7.bin
afd2c899dd8ab9061813acc1859e43f18a3fa03f76f34e09d3bbfe7e90289dc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF7 5556 bytes
font_01_sfnt_off000091dd.bin
4cf8aed9ae46f1808bb4032abe604da07163a342ec9d81b234db2871eb25f26b
pdf-font-stream PDF embedded font (sfnt) at offset 0x91DD 10240 bytes