Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab55a10e01eb223d…

MALICIOUS

PDF

42.1 KB Created: 2020-08-30 10:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddb5158635a37a77baa577766365e062 SHA-1: 966633afc56ef0ee1d502b03de4ae165aa81929e SHA-256: ab55a10e01eb223d6aced9528647ab33cd273cf584d1916bff15a995ef9eb702
128 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as an 'Amazon fire 10 tablet user guide'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the link at https://ttraff.cc/wix?keyword=amazon+fire+10+tablet+user+guide points to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, with the first being to a Shopify domain, suggesting a link farm designed to attract traffic. The presence of a visual download button lure further supports the malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=amazon+fire+10+tablet+user+guide
    • https://cdn.shopify.com/s/files/1/0438/5295/5810/files/demiza.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3671/files/drastic_ds_emulator_cracked_apk.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/digital_dash_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0459/5839/8111/files/looker_export_to_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/97976743664.pdf
    • https://cdn.shopify.com/s/files/1/0434/6281/9990/files/causal_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/tojini.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/pakexalejupozoxizor.pdf
    • https://cdn.shopify.com/s/files/1/0438/0911/2226/files/the_dark_knight_screenplay.pdf
    • https://cdn.shopify.com/s/files/1/0464/4788/6504/files/angular_2_currency_format_directive.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7473/files/types_of_text_structure.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3577/files/30605599831.pdf
    • https://static.usrfiles.com/ugd/2b25b5_04f73f6ce7b2435faab43dc436ca7032.pdf
    • https://static.usrfiles.com/ugd/b0b521_4f4f4adf12a34e11a2dbaba071d923d1.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_off00006568.bin
b23f9d05375217e87a45135626a250ddf5f16b3711567c9c43b20aeae8ccbaef
pdf-font-stream PDF embedded font (sfnt) at offset 0x6568 5600 bytes
font_01_sfnt_off00007855.bin
bcda76269c83ceb25b8567f9c9b7ab40fd4e3e325ef9c0b37985385b8789a8eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7855 10376 bytes