Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f7c588517448e7…

MALICIOUS

PDF

43.4 KB Created: 2020-08-11 13:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 946eac017f0b8c7be8001a188c850d5e SHA-1: 7583f4b045fe71a5a112af385bb75280e4cffead SHA-256: b5f7c588517448e7dae50c1cfb59befd1f4a470eb0bfeb7820a7002f76c70e72
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure. It also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO poisoning. The primary malicious URL is a redirector that likely leads to further malicious content. The document body is heavily obfuscated but contains the malicious URL.

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.cc/pify?keyword=panasonic+bread+maker+recipe+book+pdf+uk
    • http://files.owntheearth.com/uploads/1/3/1/4/131453539/busumabamo-nefurotosot-xigewonu-fojewem.pdf
    • http://files.cmefonline.com/uploads/1/3/1/4/131406448/389ed5007187.pdf
    • http://didad.myecns.com/uploads/1/3/1/4/131406286/4992760.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/rajajufupirusolevizozul.pdf
    • https://cdn.shopify.com/s/files/1/0433/7896/6686/files/pdf_of_beta_distribution_of_second_kind.pdf
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/7295406042.pdf
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/advantages_of_free_trade.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/xazozubaxavuto.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5907/files/5313874879.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/42023250333.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/dosulasuruxeperugumopof.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/71115288787.pdf
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/38272885063.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a1c.bin
4ca71a58459c3f62dfdbae32f7553ca74de76aafdeadb454ee2316ce4682f0ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A1C 5276 bytes
font_01_sfnt_off00005bdd.bin
1212fee84d6e2476b315f3252df2e61b6c469f15567039bbbcf904a38b032cfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDD 9688 bytes
font_02_sfnt_off00007d46.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D46 16204 bytes
font_03_sfnt_off00009274.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9274 4324 bytes

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