Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d6beb3a70dbd34…

MALICIOUS

PDF

42.8 KB Created: 2020-09-08 12:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28df7f25cb0429ec8b90ec823576d46b SHA-1: 9bec214557604fda47e032886b835a3ee7068a6f SHA-256: 99d6beb3a70dbd341682188fc6b87f848772c12d9432aee9c419e84cb6b51d88
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to "scrolling website template" and the malicious URL. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful 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.me/wix?keyword=scrolling+website+template
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/amplified_bible_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/b_forman_park_pultneyville.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/mixetewogegexabo.pdf
    • https://cdn.shopify.com/s/files/1/0445/3921/6036/files/marginal_and_absorption_costing_exam_questions_and_answers.pdf
    • https://static.usrfiles.com/ugd/974a4e_26d9db695bd7432f8d48dc62e7cedd53.pdf
    • https://static.usrfiles.com/ugd/8ade13_1c1e29ed7f5a4db1949ce796528a0d44.pdf
    • https://static.usrfiles.com/ugd/a107db_b31cf5661bf74df199a3472e7e5fc2ea.pdf
    • https://static.usrfiles.com/ugd/078c79_fb00b9baa9f7421d97e591032774429c.pdf
    • https://static.usrfiles.com/ugd/432b07_a23e423c59364991be889e7f888a7bee.pdf
    • https://static.usrfiles.com/ugd/d31907_15c2970f5511479d9be76cacd82b74e8.pdf
    • https://static.usrfiles.com/ugd/3aee12_483c893cf2f3468d8bd4dd04470f304c.pdf
    • https://static.usrfiles.com/ugd/4bb894_cd047e44fc914494b410921dbbb90f71.pdf
    • https://static.usrfiles.com/ugd/dcf9ad_733b8159ea5b47718be9513d6348bd7c.pdf
    • https://static.usrfiles.com/ugd/5926b4_e49b093a16194aa4b7852ed277affb61.pdf
    • https://static.usrfiles.com/ugd/7ad284_b5118541af754683b47ca76dcab876c5.pdf
    • https://static.usrfiles.com/ugd/868401_669e55e50b6a4485b1253243c7104f41.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_off0000687e.bin
64f3aad5aec8bf4fc89757e12412de9bd4f6b1702a470aacdd33735fe8455577
pdf-font-stream PDF embedded font (sfnt) at offset 0x687E 5588 bytes
font_01_sfnt_off00007b74.bin
6e52366f8a913b7ad9c63b117d2210970570e50074a03e4fcaf40e0e2392787d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B74 10240 bytes