Malicious PDF — malware analysis report

Static analysis result for SHA-256 a031dae6ed607209…

MALICIOUS

PDF

45.7 KB Created: 2020-09-02 20:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ca98d3403550706397b6dedce052795 SHA-1: 9ec5f08a78cd5b5ce823eecbc53a734412dd48da SHA-256: a031dae6ed6072092514778adb07a714d3f5180f2597b15f896d54bc46bfdf5e
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=yowhatsapp+update+new+version+free'. This URL is presented within the document body, disguised as a 'Yowhatsapp update'. The file also exhibits characteristics of a PDF SEO link farm, with numerous embedded links to external PDFs, including 'https://static.usrfiles.com/ugd/50de67_2a03eed053614fe6a7794044427f0852.pdf'. The presence of a download button lure further supports a social engineering attack. The primary intent appears to be directing users to malicious infrastructure via the deceptive link.

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.link/wix?keyword=yowhatsapp+update+new+version+free
    • https://static.usrfiles.com/ugd/50de67_2a03eed053614fe6a7794044427f0852.pdf
    • https://static.usrfiles.com/ugd/b8c837_146b08c34cde469494a55c87ba4bcac1.pdf
    • https://static.usrfiles.com/ugd/d54300_c2ac397e24a74c7181a9233a0fe46f5e.pdf
    • https://static.usrfiles.com/ugd/cc3ca9_d464c6f22bbb4b23a5ba46123556f697.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/78013960399.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/kijov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zosogorimojafi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2153/files/arcgis_full_crack.pdf
    • https://cdn.shopify.com/s/files/1/0457/9970/2694/files/perforated_sheet_metal_suppliers_in_singapore.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/91765560184.pdf
    • https://cdn.shopify.com/s/files/1/0435/9100/8418/files/sweet_dreams_marilyn_manson_tablature.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/es_file_explorer_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/6614/6472/files/9312300338.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_off00007602.bin
783678588bfc3f6f5507e7237dbf03c01c8530c9a4baf725275183584fc395c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7602 5208 bytes
font_01_sfnt_off000087ca.bin
475b21c6cc4c0470f332bbf6e7a25de46dac321613ee19ee4f682aa63cca44f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x87CA 9980 bytes