Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13abc45b0de1c3f…

MALICIOUS

PDF

43.6 KB Created: 2020-08-30 17:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19446ed83e2619a112a5b462bab911ed SHA-1: 356b1c2db3f39cb9b536e27b3e3317be259e59c8 SHA-256: d13abc45b0de1c3f773a1bad2d9598e49de7b7a8c1ef43b11c78ad017b55a713
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates that the document is part of a link farm, likely to manipulate search engine results or distribute malicious content. The primary malicious URL identified is https://ttraff.com/wix?keyword=tengo+ganas+de+ti+pdf+completo+descargar, which is flagged as a redirector.

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.com/wix?keyword=tengo+ganas+de+ti+pdf+completo+descargar
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/mac_auto_clicker_free_advanced.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/35013970767.pdf
    • https://cdn.shopify.com/s/files/1/0462/9531/8689/files/guvewe.pdf
    • https://cdn.shopify.com/s/files/1/0443/0187/7404/files/grammatical_categories.pdf
    • https://static.usrfiles.com/ugd/a1fb72_d085bdc4018348b89b9c42b0ef31c998.pdf
    • https://static.usrfiles.com/ugd/b8c837_7716abd5297f4629bca5cf08fa05de70.pdf
    • https://static.usrfiles.com/ugd/b8c837_d771a117df0c467e8870d4fd291b8aa6.pdf
    • https://static.usrfiles.com/ugd/902d29_0fb1ea4ce69d4cdb8c0debca67707dee.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f942ffbf94a42d18c802cc273553ebc.pdf
    • https://static.usrfiles.com/ugd/82e28d_734a002f152a4dcbac0ccf302e372702.pdf
    • https://static.usrfiles.com/ugd/0779a3_610cf561f43b434abc600c6ed37f3b3f.pdf
    • https://static.usrfiles.com/ugd/3e87bf_d2feff5d348c438a9cda5ee99018508c.pdf
    • https://static.usrfiles.com/ugd/b8c837_fca9b70c27e743ee82280ac60cf0ac31.pdf
    • https://static.usrfiles.com/ugd/b8c837_832aecef188b4b538cd4dcace800634b.pdf
    • https://static.usrfiles.com/ugd/b56239_5cdb6c5f968a43b18b833162198b9c28.pdf
    • https://static.usrfiles.com/ugd/4bb894_79d6bf588d454889bbaeb192159499f7.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_off0000684a.bin
aaac3cc28eb69447223ec4e3ce97283ea24b4d3c1909005b4040933abadabcf9
pdf-font-stream PDF embedded font (sfnt) at offset 0x684A 5424 bytes
font_01_sfnt_off00007aa6.bin
12b5e24a93cf0334cf08b319632236f638ef56d0f6ca184c06e26ca58878bb81
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA6 11576 bytes