Malicious PDF — malware analysis report

Static analysis result for SHA-256 977749f3ca7971c4…

MALICIOUS

PDF

43.1 KB Created: 2020-08-05 23:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e9e3e9a77b8f099139f2261f27a9d49 SHA-1: b6f0f8a4ec4c724dce7a348769881a01f1e539d4 SHA-256: 977749f3ca7971c449d0a5d39292e44be4d3ad7be81ed85f6aa3191fefe6fefe
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which are SEO-optimized and point to benign Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). The document body, though heavily obfuscated, contains the text 'Bangkok city map pdf download' and the malicious URL, suggesting a lure to trick users into clicking the malicious redirector. The presence of numerous links, including a malicious one, indicates a likely attempt to drive traffic to malicious infrastructure.

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=bangkok+city+map+pdf+download
    • http://files.lamayeshehouse.org/uploads/1/3/1/4/131438313/nejanokogeg.pdf
    • http://bopos.ocatilloaudiovisual.com/uploads/1/3/1/6/131606552/bakab_kaxoragofizu.pdf
    • http://files.northernnerd.com/uploads/1/3/1/3/131379680/wobifopedufinu_beruwedorelixif_kugepa_gakofus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33078626275.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/73266247093.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/noresibasosezux.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9401/files/mojunixovopa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1077/5464/files/berserk_2017_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0432/2767/6829/files/26605072644.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9018/files/muni_next_bus.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9310/files/kakavavebokizo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/55622320323.pdf
    • https://cdn.shopify.com/s/files/1/0438/7222/3387/files/30491370544.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/john_deere_48_inch_mower_deck.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/rawat_inap_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0438/7527/0811/files/jitomizizojuxadonazuko.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_off000069f7.bin
93fa996f0c98c0924bbf13ac96baecb76c08bed17de3be06f9cd2dfc87297442		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F7 5508 bytes
font_01_sfnt_off00007cd0.bin
bc7279db640ccb7bb16d588de442cd198f45ba8ea84e1a0c53d74b111eeb4bd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD0 10156 bytes

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