Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d8b692516f3c5c…

MALICIOUS

PDF

42.6 KB Created: 2020-08-28 21:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c902af1c298f7f16855d5a2c820cbf74 SHA-1: f599a5761b5d42dd40b55ca7d392749b835f009c SHA-256: 64d8b692516f3c5cec27d19333881d537891d09d952a699911a95f1a283b26fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a prominent link disguised as a download for 'The Amazing Spider-Man' APK, which redirects to a malicious URL. This indicates a social engineering attempt to trick users into downloading and executing potentially harmful Android applications. The PDF also contains a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic.

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=the+amazing+spider+man+apk+download+for+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/jelunuvutibun.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/wijujaliwidufiwibitub.pdf
    • https://cdn.shopify.com/s/files/1/0433/5747/0870/files/veganismo_historia.pdf
    • https://cdn.shopify.com/s/files/1/0432/2941/3544/files/fukebimupupujatakuza.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/50369856609.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1883669ff4c45148f125acd4cf4194b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c03e11b03fc4f46b2e3868bc0f208f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_643fd96829174a5bada6054e7027b46e.pdf
    • https://static.usrfiles.com/ugd/b8c837_20ffe5153bf840dda99856ec899bec2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_affdca35539d4e3f84b75cf182a391b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_49de9b72dd4b4994967c082c2c7f984e.pdf
    • https://static.usrfiles.com/ugd/b8c837_680cec348eef439dabd0a506550f8eb2.pdf
    • https://static.usrfiles.com/ugd/b8c837_94283133bc734ca2853e7868c2078e9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bec7f00dfa645c18488ffa75b96729d.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065a0.bin
6f49c733e0c126145ae1e64d4f4ff96a8f392295eedbeaffd0e5e01b234c6e95
pdf-font-stream PDF embedded font (sfnt) at offset 0x65A0 5608 bytes
font_01_sfnt_off000078ae.bin
a84d4a153a5655e09edafbe258356e548fdef8646e9e219ca643d37eda99791d
pdf-font-stream PDF embedded font (sfnt) at offset 0x78AE 10728 bytes