Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f807bb3f42acbf…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 10:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f67b1912bc08221f1ffa6fb99cf69dc SHA-1: f22a372244e4709755d6302552b5b9c107afd1e8 SHA-256: 69f807bb3f42acbf8731143d5b0ee8786b906d8f9546d897a2f96712edd315db
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing a download and the malicious URL. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious 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=the+carter+3+download+zip
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/jezamilerafurolupaxex.pdf
    • https://cdn.shopify.com/s/files/1/0432/1692/8923/files/gujajikavilosoredagesovu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/26251575486.pdf
    • https://cdn.shopify.com/s/files/1/0451/9664/0407/files/tatalaksana_cacar_air.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/bulop.pdf
    • https://static.usrfiles.com/ugd/b8c837_f20e34dc86bb4b579029d044e266d776.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e02d159814f48ccad7b6ad8e4ef7be0.pdf
    • https://static.usrfiles.com/ugd/b8c837_daf709f4c772486cbde61e62e75b0001.pdf
    • https://static.usrfiles.com/ugd/b8c837_3fbf20b3a4684a5ba762c53a39b1ad9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_04eef45f742f4f87acb1d72b3f3c0026.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cbf90df8ae845fba507f72abba8354c.pdf
    • https://static.usrfiles.com/ugd/b8c837_66510327cdb34ea39dd840bf1933f4ff.pdf
    • https://cdn.shopify.com/s/files/1/0451/3919/8105/files/hng_dn_chuyn_file_dng_nh_sang_word.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8497/files/sikukopotanalududojakopa.pdf
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/wuvaripogemanax.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_off0000691e.bin
89115012d6bd9f54f1651c8fe9ee063545e4167144437099636e98eb539dee77
pdf-font-stream PDF embedded font (sfnt) at offset 0x691E 5240 bytes
font_01_sfnt_off00007aff.bin
0f8a582854f2ad3bb7a84e1fdbcb5afa40b808bfaa07f6eaf839289112481b65
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFF 10160 bytes