Malicious PDF — malware analysis report

Static analysis result for SHA-256 823ea7c784b4f37e…

MALICIOUS

PDF

48.9 KB Created: 2020-08-21 18:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7314983ba02cd0d72a701199f43ba3ef SHA-1: 874707f4a6179dc2076f2b3354b1669443be0ba6 SHA-256: 823ea7c784b4f37e929cfab05b2bd8449ae6be0a6500f88bd3696f50435ecfa2
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=jnc+8+hypertension+guidelines+2017+pdf'. This indicates the document's primary purpose is to redirect the user to a potentially harmful site. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content broadly. No scripts were extracted, but the embedded malicious URL is a high-priority indicator.

Heuristics 3

  • 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.
  • 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=jnc+8+hypertension+guidelines+2017+pdf
    • http://files.creativepathwaysprep.com/uploads/1/3/2/7/132740756/1314521.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/vaxogodupavovadap.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/55465371122.pdf
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/19932395426.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/27650825666.pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/milan_classification_of_salivary_gland_tumors.pdf
    • https://cdn.shopify.com/s/files/1/0437/7752/3873/files/power_of_attorney_form_ct.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/vibugivu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/doweketifiwub.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/mimivapifixifiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/spanish_1_final_exam.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/31805998292.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/propiedades_fisicas_y_quimicas_de_los_metales_alcalinos.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/56415476031.pdf
    • https://cdn.shopify.com/s/files/1/0437/2129/3974/files/11922224959.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_off0000739e.bin
79c9a74665904eea1de6634e1a35bac05f7842e51b0b881206e7d32a5d0b107c
pdf-font-stream PDF embedded font (sfnt) at offset 0x739E 5896 bytes
font_01_sfnt_off000087b7.bin
f8607db32c736bec258d271bfd881519b5ef99ff1c3edf8547e3003ffda74fb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x87B7 15084 bytes