Malicious PDF — malware analysis report

Static analysis result for SHA-256 4788a3dc8341ecf5…

MALICIOUS

PDF

33.7 KB Created: 2020-08-06 17:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51a4b159cbb626499b1502bc29a63b71 SHA-1: d0982de63b480a5ba9803e5bb548257ff3aa4cc5 SHA-256: 4788a3dc8341ecf5c3b8979d854ff12380040edece027ca65961c2c9d3207bc1
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of numerous embedded links. One critical heuristic firing indicates a PDF redirector link to 'ttraff.ru', which is known malicious infrastructure. Another critical heuristic identified a large external PDF link farm, with many links pointing to Shopify domains. The document body contains garbled text but also includes the URL 'https://ttraff.ru/pify?keyword=law+on+obligations+and+contracts+soriano+pdf', suggesting a lure related to legal documents. The primary attack pattern involves redirecting users to malicious sites, likely for phishing or malware delivery.

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.ru/pify?keyword=law+on+obligations+and+contracts+soriano+pdf
    • http://files.aslanspaw.net/uploads/1/3/0/7/130776601/8dce4f874.pdf
    • http://files.bonairetaxi.net/uploads/1/3/1/4/131437593/dawidewubozop-kopokibexevabif-jageso.pdf
    • http://files.iamcarlageorge.com/uploads/1/3/2/7/132740838/7611606.pdf
    • http://files.thesoundingboardministry.com/uploads/1/3/0/7/130738911/zigidobisewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/58455515514.pdf
    • https://cdn.shopify.com/s/files/1/0439/5424/1694/files/tadidizosurugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9538/files/jinedidukomuwoxikideme.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/wapiwulijowijedegejaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zukukujumifuxutage.pdf
    • https://cdn.shopify.com/s/files/1/0437/7768/7701/files/39737594402.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4631/files/mekesowokuvirodi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/83988783767.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5318/files/jajajewe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/wanovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5559/5172/files/compound_complex_sentence_practice.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/statistical_inference_v_k_rohatgi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/33348984288.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0992/files/4825374089.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_off000046b4.bin
f11a41b8206b199cac1c0cc8869cc4f208ba12e7be2f2766994df4afe4c5eed0
pdf-font-stream PDF embedded font (sfnt) at offset 0x46B4 5496 bytes
font_01_sfnt_off00005985.bin
2042f48501096a003581f35ddd3c05a3920de14137f5dffdce97b9bd86b3b031
pdf-font-stream PDF embedded font (sfnt) at offset 0x5985 9384 bytes