Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84d7aab9fbce952…

MALICIOUS

PDF

40.7 KB Created: 2020-09-02 09:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6ed8872192b04b7a379a02d77a82ce6 SHA-1: d97af31a88cb48de3670cd7331762973d90dd936 SHA-256: f84d7aab9fbce952e45c25c3a25df5586f094ef7288b8a7fe004625933933b0e
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.me/wix?keyword=d2+chalice+guide', is flagged as pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body appears to be largely obfuscated or contains metadata rather than user-readable content, but the presence of the malicious redirector link is the primary indicator of malicious intent.

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.me/wix?keyword=d2+chalice+guide
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/41954765821.pdf
    • https://cdn.shopify.com/s/files/1/0440/5572/4197/files/hallelujah_noty_na_klavr.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/xomekakelututiwebe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/42884818212.pdf
    • https://cdn.shopify.com/s/files/1/0428/5962/6655/files/evil_jack_o_lantern_template.pdf
    • https://static.usrfiles.com/ugd/0e2875_5f634f7e2edb4b56bb36298d1ba16e4e.pdf
    • https://static.usrfiles.com/ugd/01bc73_d4a30e3c3da54c7db72ede4d064bdcec.pdf
    • https://static.usrfiles.com/ugd/ec0c41_527d839a5d204a5eb8c6171e369f1680.pdf
    • https://static.usrfiles.com/ugd/35ddae_db2b697fc4d641f99fc12e258d2c69ae.pdf
    • https://static.usrfiles.com/ugd/963627_05a08aaa4aa8478fa1054ba529e612f8.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/zedet.pdf
    • https://cdn.shopify.com/s/files/1/0462/5937/2183/files/zomupuviterinodo.pdf
    • https://static.usrfiles.com/ugd/b8c837_fafa41c826854254940890c10bed8360.pdf
    • https://static.usrfiles.com/ugd/8b49c6_b674009d98fc455fa052574db600c7e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a060cd64c25c402587a458acebd61234.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_off0000632c.bin
873f343e91800e4c523052fdfdb10b5e5243ec7976273aca5a4898004401894e
pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 5056 bytes
font_01_sfnt_off0000745e.bin
d4240a80e74c8477c8535918e0b84f17e5112309ef890a26a4808a8b87abb679
pdf-font-stream PDF embedded font (sfnt) at offset 0x745E 9884 bytes