Malicious PDF — malware analysis report

Static analysis result for SHA-256 adcb7c16f73b95db…

MALICIOUS

PDF

41.8 KB Created: 2020-08-29 01:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5352ccede38e87a39426645cd8e5e171 SHA-1: a51d0921d8bcfe00b9faee5a7c99f2df29f54df2 SHA-256: adcb7c16f73b95db4b8de7fe6939e90eab291fa09177cbc0bc85bdefeac34281
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the primary link leads to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large collection of external links, many pointing to Shopify-hosted PDFs, which is a common tactic for SEO poisoning or distributing malicious content. The document body itself is largely unreadable binary data, but the presence of the malicious URL is the strongest indicator of its intent.

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.com/wix?keyword=6-2+practice+parallelograms+answer+k
    • https://static.usrfiles.com/ugd/b8c837_59a3f8f832df406fada6ea5a6ff290ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_23aa52622ae04cd6862ec580406df94f.pdf
    • https://static.usrfiles.com/ugd/b8c837_adf1e05142ca4a52861a99efe5ed1804.pdf
    • https://static.usrfiles.com/ugd/b8c837_273f057a034d4f53a9ffdfa2c6cd3527.pdf
    • https://static.usrfiles.com/ugd/b8c837_e205eb3363e2408e819946be9afc4edc.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/quran_para_30_with_urdu_translation.pdf
    • https://cdn.shopify.com/s/files/1/0461/9760/4503/files/wosuwuzowaxenumujivelepu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/ayodhya_film_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/88594191060.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/36454254691.pdf
    • https://cdn.shopify.com/s/files/1/0428/9776/8614/files/zegoxepe.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/70523902604.pdf
    • https://cdn.shopify.com/s/files/1/0443/0381/0716/files/definisi_patent_ductus_arteriosus.pdf
    • https://cdn.shopify.com/s/files/1/0429/0369/9615/files/fundamentals_of_engineering_economics_chan_park.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/pidowobiw.pdf
    • https://cdn.shopify.com/s/files/1/0427/9648/2727/files/beck_hopelessness_scale_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3595/0236/files/xiwerevovuzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8992/files/algology_book.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_off0000625e.bin
c9bb294320f252f99e38c92b6c92cf722c9e023177ff9a8bb93fdbc542f6cba3
pdf-font-stream PDF embedded font (sfnt) at offset 0x625E 5632 bytes
font_01_sfnt_off00007585.bin
c869740ea18ca6eb18af40de59f5a7820aab622ea6799a19a894836100603607
pdf-font-stream PDF embedded font (sfnt) at offset 0x7585 10776 bytes