Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee60f4db4e803023…

MALICIOUS

PDF

41.1 KB Created: 2020-07-26 17:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3583ff52cb095d90d8053e17aa373512 SHA-1: cc17d0a6e6238cad13ad3ecfa074836bb905d8da SHA-256: ee60f4db4e8030231614b84d6c017cc9127c4bc1fa6d647348e3d0dcbdac7e16
152 Risk Score

Malware Insights

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

The PDF file contains a link farm and a redirector link, indicating an attempt to direct users to malicious websites under the guise of IKEA bed instructions. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which is designed to lead users to further compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/pify?keyword=brimnes+ikea+bed+instructions+pdf
    • http://files.thevillagespainlakebalboa.com/uploads/1/3/1/3/131398097/4c28af92f39.pdf
    • http://files.smallcoffee.ca/uploads/1/3/0/9/130969003/b9175.pdf
    • http://files.gardentogourmet.com.au/uploads/1/3/0/7/130775506/9466237.pdf
    • http://files.fourthmoonmusic.com/uploads/1/3/2/7/132741225/7c5c95931736a.pdf
    • https://cdn.shopify.com/s/files/1/0430/7199/6053/files/77650630983.pdf
    • https://cdn.shopify.com/s/files/1/0437/8089/8973/files/32970844786.pdf
    • https://cdn.shopify.com/s/files/1/0429/5386/7427/files/jawonufijorixi.pdf
    • https://cdn.shopify.com/s/files/1/0440/9825/7048/files/wokum.pdf
    • https://cdn.shopify.com/s/files/1/0434/2087/6962/files/devegapipasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/rulawujelalobupidib.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/47603963991.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2240/files/fagenitedizem.pdf
    • https://cdn.shopify.com/s/files/1/0439/8841/8718/files/fupomijilugabovuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3447/files/9601662297.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_off0000638f.bin
3818f12981d9d337909b98fa6cd692c543b1c7558856ed47ca56b88cd42856bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x638F 5404 bytes
font_01_sfnt_off000075c7.bin
6daa7dc922d247ae2b82cc32f08030ba45ffcb0c0dc23569d249575c898d00a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x75C7 9884 bytes