Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a548b49ff404eec…

MALICIOUS

PDF

73.2 KB Created: 2020-08-08 01:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77c34031fb1e9a8edaeee37659d22aa9 SHA-1: 03a9ca0ff99ce919e6885aff22f5ee63e6584dae SHA-256: 4a548b49ff404eec1ab6ece9fa8f147098ab8141dae48f139ad3bc0a2ae360bd
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many of which point to a redirector service. One such link, 'https://ttraff.ru/pify?keyword=paris+metro+map+with+streets+pdf', is explicitly flagged as malicious. The presence of a 'download button' heuristic further suggests a social engineering attempt to trick the user into clicking the malicious link. The document body, though heavily obfuscated, contains the malicious URL.

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.ru/pify?keyword=paris+metro+map+with+streets+pdf
    • http://files.wettexttees.com/uploads/1/3/0/9/130969573/6e63042c74.pdf
    • http://files.rendonmediation.com/uploads/1/3/1/4/131437987/kojebifugo.pdf
    • http://files.quickstoptyres.com/uploads/1/3/0/9/130969148/d5158a3fb.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8581/files/binanobatudijebojokoro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/4728131105.pdf
    • https://cdn.shopify.com/s/files/1/0440/7758/0453/files/what_does_dumping_a_game_mean.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/history_of_english_literature_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9387/6118/files/blueprint_sample.pdf
    • https://cdn.shopify.com/s/files/1/0440/2633/1286/files/consumer_reports_best_mattresses_2016.pdf
    • https://cdn.shopify.com/s/files/1/0431/1652/7770/files/3109733870.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6165/files/pusixe.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/zaluwonipajuwaninadixewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/67057724165.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/nofalogilomawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/jetogomakopebotozefibaro.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_off0000ccc7.bin
122b722e7b46ffe6c5050be84c09b051a5bdbb1e2a0d83017053f83ac77dd37b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC7 5340 bytes
font_01_sfnt_off0000ded6.bin
290515334a668d79c69e07846f5b088bafb750a00d9caec23e62bc71ec4c2997
pdf-font-stream PDF embedded font (sfnt) at offset 0xDED6 10128 bytes
font_02_sfnt_off000101ae.bin
f3b95f1269985bafc3dfb9b5b35e76df8a4d57039a143c013aed99c7cf3a4a89
pdf-font-stream PDF embedded font (sfnt) at offset 0x101AE 16344 bytes