Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df42946a5e2a25c…

MALICIOUS

PDF

43.7 KB Created: 2020-08-23 23:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b98cc0aa999c601292b34815fd468687 SHA-1: 117cbb02b14660c7cfd5d7da1bfcc42fb3e2911f SHA-256: 7df42946a5e2a25ccecb46cc538bbdfba1f9b7b751f020f402cd7f06c3bab15d
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one link pointing to a known malicious redirector. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=installare+android+studio+su+linux+mint', which is likely intended to trick the user into downloading a payload. The presence of a visual download button lure further supports this 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/pify?keyword=installare+android+studio+su+linux+mint
    • http://nutoged.bakerycreationsbykeri.com/uploads/1/3/0/7/130739561/d0ff11.pdf
    • http://files.emmazen.com/uploads/1/3/1/3/131381480/juviwoferuxo_tusosuj_dibarugi_mekipamave.pdf
    • http://bezini.jfrancoist-shirtsdesigns.com/uploads/1/3/0/8/130813780/forom.pdf
    • http://files.centerforessayexcellence.com/uploads/1/3/2/6/132681877/xuvaseva-tuxuti.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/usmle_biostatistics_and_epidemiology.pdf
    • https://cdn.shopify.com/s/files/1/0435/5401/3336/files/95230405501.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/scope_statement_in_project_management.pdf
    • https://cdn.shopify.com/s/files/1/0432/9567/0427/files/1000_bible_study_outlines.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/model_aida_reklama.pdf
    • https://cdn.shopify.com/s/files/1/0431/3156/8290/files/56742096599.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dogudanivivakow.pdf
    • https://cdn.shopify.com/s/files/1/0432/5156/4707/files/merit_amharic_english_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0431/0669/7367/files/88333375879.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f14.bin
6f184e937c3136bc1728c7ee14065cc31bb3a7df81a8c87c18fda9ea2d84a298
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F14 4860 bytes
font_01_sfnt_off00006f71.bin
1b4e3480a078418d70a37a16e42aa3ba543651382a0e2720cb136a750ff70d97
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F71 10748 bytes
font_02_sfnt_off00009418.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9418 4324 bytes