Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa54b0f8f7246ee…

MALICIOUS

PDF

54.9 KB Created: 2020-08-25 20:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7bd62a8955113f2ac768ef40d2a56a0 SHA-1: 371e049db02106543b90efba68401a22d729dfb2 SHA-256: eaa54b0f8f7246ee5fc1167c370cb1b435733e1e8dd6b1bff1464a6dec59bf0b
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, however, redirects through a known malicious domain (ttraff.cc). This suggests a link farm or SEO poisoning attack, where the PDF is used to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=warhammer+age+of+sigmar+generals+handbook+2019+pdf
    • http://files.panisangelicuspress.com/uploads/1/3/1/3/131384018/7094245.pdf
    • http://files.xtabentum.com/uploads/1/3/0/9/130969576/xuxomivoguxezupani.pdf
    • http://files.rhymedilation.com/uploads/1/3/0/7/130776786/c138d437c91322.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8286/files/94269883281.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9303/files/lspdfr_variety_callouts.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21154843933.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36149341097.pdf
    • https://cdn.shopify.com/s/files/1/0443/9313/6294/files/wavelet_neural_network.pdf
    • https://cdn.shopify.com/s/files/1/0432/4222/5832/files/nuwukojom.pdf
    • https://cdn.shopify.com/s/files/1/0430/6403/3429/files/waborojepadovufipukep.pdf
    • https://cdn.shopify.com/s/files/1/0429/0969/6156/files/xoroxitazarepamikipeza.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/28950616253.pdf
    • https://cdn.shopify.com/s/files/1/0437/7326/4030/files/past_simple_regular_verbs_exercises_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7099/files/zexosor.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9662/files/flowcharting_template_ibm.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/estado_neoliberal_caracteristicas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008938.bin
ce88e5b6ece4d4c6deb4d6b71930d9c6f16fbec701a0416b791219a8451f31cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8938 5860 bytes
font_01_sfnt_off00009d07.bin
2532805ec1150e2b4f0a9fa7bf065b519b2e52253729c712787c226ea757fc2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D07 10288 bytes
font_02_sfnt_off0000c047.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC047 4324 bytes