Malicious PDF — malware analysis report

Static analysis result for SHA-256 8713e1b3fc204bd4…

MALICIOUS

PDF

36.5 KB Created: 2020-08-19 19:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 055ea3169328fba3c1302c7cd29bc17c SHA-1: 4708a5a86714c9c384efb0cdbe6d6cdd37d48f22 SHA-256: 8713e1b3fc204bd45233244d9c8de68b5fba0652deb473b97ce5953b23fa36aa
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to attract search engine traffic, with one of the links pointing to a known malicious redirector. The document body itself contains obfuscated text and embedded URLs, including the malicious redirector. The presence of a malicious redirector and a link farm suggests an attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=beyonce+formation+hat
    • http://files.northernbcreining.com/uploads/1/3/1/0/131070842/f8451774.pdf
    • http://files.garrettcameronmusic.com/uploads/1/3/1/4/131452939/4244457.pdf
    • https://cdn.shopify.com/s/files/1/0434/6540/8662/files/24853078372.pdf
    • https://cdn.shopify.com/s/files/1/0462/0232/3094/files/makita_circular_saw_track_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/8634/6408/files/76218838493.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/17121313804.pdf
    • https://cdn.shopify.com/s/files/1/0440/1935/1710/files/us_military_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/virtualbox_mount_shared_folder_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/famudaverupipemuluxup.pdf
    • https://cdn.shopify.com/s/files/1/0432/3282/1412/files/actuators_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/50021518911.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1589944702.pdf
    • https://cdn.shopify.com/s/files/1/0433/8237/4561/files/54597758797.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/kawajokevudolipol.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/noropofesopet.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_off0000520c.bin
1ca6039be9de684ba32ea035ce756a4989f61c8479fa00869e25f6006ba495b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x520C 5060 bytes
font_01_sfnt_off0000631b.bin
91fcbd5b5c68b712f2e5dea2bf670a111e6a79fa90cc1d8837848de352d545dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631B 10048 bytes

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