Malicious PDF — malware analysis report

Static analysis result for SHA-256 3000d8eec47a6049…

MALICIOUS

PDF

39.8 KB Created: 2020-08-07 16:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f090fead808f2f5631ec2bee938a0922 SHA-1: 27716bb5d481cdf773c36814029b9d35e549b79a SHA-256: 3000d8eec47a6049573f4866b144149dc5cc4af3fa9edfc4656e80cc05c57f26
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary malicious URL being a redirector. The document body is heavily obfuscated but contains references to the malicious URL and other benign-looking PDF files hosted on Shopify. This suggests a link farm or SEO poisoning attack designed to lure users to malicious content.

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=amiodarona+tiroides+pdf
    • http://files.legendscomix.com/uploads/1/3/1/4/131437984/2387046.pdf
    • http://files.estellessweetitchblankets.com/uploads/1/3/1/4/131409170/tixavaxanepuluxuvit.pdf
    • http://files.novelsf.com/uploads/1/3/1/4/131483550/mataxopawowojuvuba.pdf
    • http://files.riccijustisart.com/uploads/1/3/2/6/132696280/tanepuwimoxe-fofan-nufema-nuxebusazokolez.pdf
    • http://files.menomoniesaddleclub.org/uploads/1/3/2/7/132712174/6f3552156cd01.pdf
    • https://cdn.shopify.com/s/files/1/0434/0704/8860/files/59154773283.pdf
    • https://cdn.shopify.com/s/files/1/0432/1355/3827/files/albert_ellis_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1386/files/dilolekibufiwapagibofa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9610/files/678_279_7980.pdf
    • https://cdn.shopify.com/s/files/1/0434/3755/5864/files/rewovusitujinixog.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/pdf_charlotte_s_web.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/75641518531.pdf
    • https://cdn.shopify.com/s/files/1/0437/8053/8529/files/90395799935.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/56535719733.pdf
    • https://cdn.shopify.com/s/files/1/0439/1688/6184/files/39706300385.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/ss13_radio_frequencies.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_off00005ed7.bin
6ae5d18a8f847cfba819fd56f60b4dc946d714f1c7618924951e7dcc6bf62e90
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED7 5144 bytes
font_01_sfnt_off0000703d.bin
b92bd07ca31ee4d1bd189a71e10df9d698034addabef57e6c63995d0f750ebb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x703D 10088 bytes