Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcbcad68b9a9ca8f…

MALICIOUS

PDF

41.2 KB Created: 2020-08-31 03:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c93e712636bff92c401e98493bf3c1f1 SHA-1: eaf43e22c353ec9d053892e397f1f20fcb84ad0c SHA-256: dcbcad68b9a9ca8f0b08930eafdb6807a41938ab8dec7c0899783b53e7d0dbc6
152 Risk Score

Malware Insights

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

The PDF document contains a lure related to a movie title, 'Harry potter lanetli çocuk full izle', which is likely intended to entice users to click on embedded links. The primary malicious URL identified is https://ttraff.cc/wix?keyword=harry+potter+lanetli+%25C3%25A7o%25C3%25A7uk+full+izle, which is flagged as a malicious redirector. The document also contains a large number of links to static.usrfiles.com, which is identified as a link farm, suggesting a broader campaign to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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=harry+potter+lanetli+%25C3%25A7o%25C3%25A7uk+full+izle
    • https://static.usrfiles.com/ugd/e6092c_e38398107f474b129cc2092c9e94767b.pdf
    • https://static.usrfiles.com/ugd/0df15e_c51fc9953cdd4b3d81751e39c55e421f.pdf
    • https://static.usrfiles.com/ugd/b8c837_345a2890becb4ebc98417d0748cca333.pdf
    • https://static.usrfiles.com/ugd/895bef_d8ad1c5afb0145a0a2a82c5c8328d940.pdf
    • https://static.usrfiles.com/ugd/8cbfce_94259d072a1a4e1982cab98fe8c0e2c0.pdf
    • https://cdn.shopify.com/s/files/1/0440/1859/8038/files/givinir.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3242/files/colombian_flag_emoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8700/files/87503024044.pdf
    • https://static.usrfiles.com/ugd/b8c837_de39db9160a14e5b852ed7e15ec69196.pdf
    • https://static.usrfiles.com/ugd/07ef24_1c859aa995f94556932ddb448e29b539.pdf
    • https://static.usrfiles.com/ugd/2d1648_1a4a714175a541809d939c089bc62202.pdf
    • https://static.usrfiles.com/ugd/4d400c_c2f77d2c1fcb4c48bc44609c57c4bd77.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6042/files/gopipaporejutaluwoxenawa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6124/files/2056377211.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_off00005f05.bin
582b2af39d880b24674392b6c6ae7f35441346a1343da22870cb54c5c6a3aa62
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F05 5076 bytes
font_01_sfnt_off00007070.bin
15bbf7d3a5d885a3adb0eef943a81a0b5879df4903adffe349489bf9edd863dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7070 12128 bytes