Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c70fc99b86a2d68…

MALICIOUS

PDF

43.7 KB Created: 2020-08-13 03:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9656d7ed0db05235f35019458db10c1c SHA-1: 48ac115284cc0327bf1682c8f0afd0e59fa5bb4f SHA-256: 7c70fc99b86a2d68b8be4ccc54c71200e5c4ddea48a61517f131568fa5d71acc
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF document contains a fake invoice lure, aiming to deceive the user into clicking on embedded links. The primary link, 'https://ttraff.com/wb?keyword=advantages%20of%20computerised%20accounting%20systems%20over%20manual%20systems', is flagged as a malicious redirector. Additionally, the document hosts a large number of external PDF links, many hosted on shopify.com, suggesting an SEO poisoning or link farm tactic to distribute malicious content. No scripts were extracted, but the PDF structure and heuristics strongly indicate a malicious redirection attempt.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wb?keyword=advantages%20of%20computerised%20accounting%20systems%20over%20manual%20systems
    • http://files.thebrainybrunette.com/uploads/1/3/1/4/131453904/5774775.pdf
    • http://jirepiwut.violettapretorius.com/uploads/1/3/0/7/130738914/webofelizolagoxa.pdf
    • http://zudiwome.europeanburmesebc.org/uploads/1/3/2/6/132682883/wamuvadakugu-vosuz.pdf
    • http://files.rachelheltonmusic.com/uploads/1/3/1/1/131164009/sexarololanovogab.pdf
    • http://files.rascalmartinez.com/uploads/1/3/1/4/131437689/8220341.pdf
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/21280977518.pdf
    • https://cdn.shopify.com/s/files/1/0437/3456/5025/files/buvipujigajedexejafepuso.pdf
    • https://cdn.shopify.com/s/files/1/0439/3664/5275/files/85483370067.pdf
    • https://cdn.shopify.com/s/files/1/0431/1921/4756/files/gibulepolizomidilado.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2740/files/faa_airframe_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2501/files/believe_in_yourself_full_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5756/files/mackie_profx8v2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2854/4668/files/new_atkins_food_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/24954259422.pdf
    • https://cdn.shopify.com/s/files/1/0438/5544/6176/files/fusionner_deux_acrobat_reader_dc.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/57480082087.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/migile.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70913092576.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6983/files/navowedetatebufidu.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_off00006be5.bin
a2efb130e0daf7a056f87eda80f89e46f82bcf6c81b7a688a6fc4cbc0b515af0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE5 5628 bytes
font_01_sfnt_off00007f02.bin
aa00f4b71ace024f05f6d318b6253fd348b25cc422b281417419f13ee1c6a3ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F02 9916 bytes

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