Malicious PDF — malware analysis report

Static analysis result for SHA-256 972b4aec1c753f88…

MALICIOUS

PDF

36.7 KB Created: 2020-08-26 20:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 907cdd1bc08a8dc94616becd2796c6cc SHA-1: 6ac74f47ac8e56196487e269bb4fe745b3c07a5a SHA-256: 972b4aec1c753f887255c7b0650ca55c374bd6ec0185641f2686327dc959f6f0
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body is heavily obfuscated but contains the URL that is also present in the heuristics, suggesting it is the primary lure. The presence of numerous links, including the malicious one, indicates a link farm or redirection strategy to obscure the final destination.

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.ru/pify?keyword=whirlpool+dishwasher+error+code+f2e2
    • http://files.suearchibaldart.com/uploads/1/3/0/7/130775448/54aced9efb54.pdf
    • http://files.hearttolifedesigns.com/uploads/1/3/0/8/130815009/pojifafam-xinuvijedo-luxozilizux.pdf
    • http://letoru.malvernhillsridingclub.com/uploads/1/3/1/1/131164313/9477324.pdf
    • http://files.hamiltonlaboratory.org/uploads/1/3/2/7/132740978/wifibimodexe_xefetijoliv_ralojiv.pdf
    • http://files.themouseholewoolery.co.uk/uploads/1/3/2/8/132814146/1112572.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5880/files/how_to_unfollow_everyone_on_twitter.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/1767417938.pdf
    • https://cdn.shopify.com/s/files/1/0429/5652/1631/files/online_js_object_formatter.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/85332594675.pdf
    • https://cdn.shopify.com/s/files/1/0437/5383/2609/files/grievance_policy_template_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/53969656727.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/74035065670.pdf
    • https://cdn.shopify.com/s/files/1/0434/6957/0198/files/zomoxitupiniwukujotojivuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/3878/4158/files/zadaterifimubibodixejire.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_off00005076.bin
4eb7e7dde90a04e00a64e0ec682bf5df4eb865d94d0279c3b783e316c9bcd51d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5076 5480 bytes
font_01_sfnt_off0000632d.bin
0d0e9879dad94f4a26a7403c00fa59f14e351384442cf99f165faf9d0b18363a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632D 10268 bytes

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