Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7be3ca2cd9ff1ab…

MALICIOUS

PDF

40.3 KB Created: 2020-08-01 09:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88f3023e0a870a37935c75a219f8ae5c SHA-1: 376e0fc42c765d1cc9cc3f0797da3e72ec19de69 SHA-256: f7be3ca2cd9ff1ab421eaecb9a1921225ffa84c3217b51fcb0600853e7235505
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=stardew+valley+bees'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'Stardew valley bees' and the wkhtmltopdf generator, suggesting a lure to a potentially malicious site.

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=stardew+valley+bees
    • http://files.furnacehillscoffee.com/uploads/1/3/1/8/131871721/wufotemuda.pdf
    • http://files.ohsband.org/uploads/1/3/0/7/130776542/8358367.pdf
    • http://files.juniorsdream.com/uploads/1/3/2/6/132695828/859842.pdf
    • https://cdn.shopify.com/s/files/1/0437/0936/6427/files/bagatolopedabiwolepupazit.pdf
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/11442645367.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8665/files/barurusakawesufaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/falixasugojux.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/lb_photo_realism_pack.pdf
    • https://cdn.shopify.com/s/files/1/0430/7533/8391/files/24048955878.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/17837705950.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9957/files/free_textures_for_blender.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/45052996777.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/95338003005.pdf
    • https://cdn.shopify.com/s/files/1/0434/6924/2534/files/zonigojavij.pdf
    • https://cdn.shopify.com/s/files/1/0431/4447/8874/files/75718073156.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_off00005f00.bin
ba671b4062cc5585b217f29cb0d199e0c4bfe2efa1ff65234a8a1005e08ac74d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F00 5316 bytes
font_01_sfnt_off00007137.bin
acf9fbcc41439eb8b3186213d88b048b190b63fa78c7dfcee0fd81b8f2f35775		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7137 10352 bytes

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