Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba65e543e029d923…

MALICIOUS

PDF

47.2 KB Created: 2020-08-05 07:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19cdeaab06f1f14b9438e8d35defd390 SHA-1: 3ac76773882a5c50c35caa866023d108a5ad951a SHA-256: ba65e543e029d9238bfe18a5e5e427ba82fad022ccac27a986e4d79abec88737
128 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to serve further malicious content. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to improve search engine ranking for malicious lures.

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.com/pify?keyword=medical+certificate+for+leave+pdf+download
    • http://files.nikkiallred.com/uploads/1/3/0/7/130738889/fogobobexukud.pdf
    • http://files.forzegym.com/uploads/1/3/2/6/132680813/9505249.pdf
    • http://tipok.jangraypianoartstudio.com/uploads/1/3/1/6/131606875/08ab3d9f5e7d38.pdf
    • http://files.motherwrenstudio.com/uploads/1/3/0/8/130873921/4dab5.pdf
    • https://cdn.shopify.com/s/files/1/0434/2012/3293/files/solidworks_advanced_drawing_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0437/8404/4705/files/partnership_agreement_contract.pdf
    • https://cdn.shopify.com/s/files/1/0432/7456/7843/files/21822048773.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/39141832393.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5479/files/vuwimarubode.pdf
    • https://cdn.shopify.com/s/files/1/0438/2890/4093/files/78335466429.pdf
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/63565591530.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/5465414042.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/10245323451.pdf
    • https://cdn.shopify.com/s/files/1/0440/3272/1046/files/nobof.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/castillos_de_cartn_almudena_grandes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/nortel_phone_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61286624564.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/
    • https://cdn.shopify.com/s/files/1/0434/9755/4084

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b33.bin
79522ea739cc815f1bcdc1c4092efded3931f16d9d54585480089cff09b0aa01
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B33 5128 bytes
font_01_sfnt_off00008cd8.bin
c554e478ac083076ffd609e2c673e317976242efef53969cf965c4fb87a6d18e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD8 10076 bytes