Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd5a34630e7ee8d…

MALICIOUS

PDF

33.1 KB Created: 2020-08-30 12:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f270592a7b38fc5b1a969582fc42d4b1 SHA-1: a34edf6aba021d8212f56d06e456982ef36bacb7 SHA-256: 2fd5a34630e7ee8d2c68fb47f15c012e23bd73edab9edf5e498bcae2de28c5f1
152 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link and a large number of external PDF links, suggesting a link farm for SEO manipulation or to distribute further malicious content. The primary malicious URL identified is https://ttraff.cc/wix?keyword=world+basketball+challenge+hacked+un, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDF links, reinforcing the lure to click on external 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.cc/wix?keyword=world+basketball+challenge+hacked+un
    • https://static.usrfiles.com/ugd/9757e7_224f74dd18a942e8b73ffa5c55a844fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8eb50b5edf940619aa5d802bfec2b70.pdf
    • https://static.usrfiles.com/ugd/8cbfce_6c112e3beb9a41ce8e4a1df4b63356a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_4959977fc9ad409686fdf6bc0d5cf32e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5c89a91c70c4a6f9670a0d1d449686d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96704933611.pdf
    • https://cdn.shopify.com/s/files/1/0444/3645/5591/files/natujafodagerasu.pdf
    • https://cdn.shopify.com/s/files/1/0458/1346/5254/files/64376636196.pdf
    • https://static.usrfiles.com/ugd/0f5b72_503b5431fc3147f5bb1e50b93e344afa.pdf
    • https://static.usrfiles.com/ugd/51c472_c4fe652b77814546a914df9882b71800.pdf
    • https://static.usrfiles.com/ugd/b8c837_e39f5220c022485ba0e63cdb5461b43d.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_4871628f791742d6a33bb19d485a87fe.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_34c624be6cdf47e5a3c81f55b0284929.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_off0000439b.bin
8907ab028ae3e56b7a41824b8b887f191f0c1b4a28b0730e5b121338f8302f3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x439B 5420 bytes
font_01_sfnt_off00005610.bin
980b594be504e589a512eca672358361303b8370f79c1950c5c41a8173b1413a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5610 9872 bytes