Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ae785d2b19df42…

MALICIOUS

PDF

36.3 KB Created: 2020-08-02 02:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a2b6884cb784ad0b39d16581eb11ac9 SHA-1: c926caab1bdc6fa57a6b63bd06361617c29cd290 SHA-256: c3ae785d2b19df421f808f52b88f69605509031c2f6e7adc31e144d9ea2d4fbb
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The primary malicious link is `https://ttraff.cc/pify?keyword=ash+like+snow`, which is designed to redirect users to further malicious content. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to lure users to malicious websites.

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=ash+like+snow
    • http://files.wistorian.com/uploads/1/3/1/6/131637631/jotuxunafex-fuvilasavi.pdf
    • http://files.advancedanaerobics.com/uploads/1/3/0/9/130969555/davam.pdf
    • http://files.hsexquisitecloset.com/uploads/1/3/1/4/131438056/60c35a4b9def0.pdf
    • http://files.bigt-farms.com/uploads/1/3/1/6/131606035/f6835af.pdf
    • http://files.jaxaerospace.com/uploads/1/3/1/0/131070523/zopagu_seniduzadinogu_fawewunum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/lutotapowunewuxagimirifim.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/59153584802.pdf
    • https://cdn.shopify.com/s/files/1/0430/5970/8058/files/zafexojokunarife.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/61628447022.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/38520491737.pdf
    • https://cdn.shopify.com/s/files/1/0429/6998/9279/files/75160449506.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/fovumejakebopew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fufalelavajukunegaxiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/pirineriwisuxamedoji.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/juxefevokezazumenomevifog.pdf
    • https://cdn.shopify.com/s/files/1/0437/3744/8609/files/5878570962.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_off00005202.bin
f4f33bffff555021726026da52b60b6084be0a780085088ae64009641abf8da0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5202 4612 bytes
font_01_sfnt_off000061c4.bin
6592fb43296cfe8bd7d5481aea477f8a9d18642f0d31468b6c03d34f9ea7c58f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C4 10320 bytes

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