Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb85e6240625347e…

MALICIOUS

PDF

43.3 KB Created: 2020-08-13 23:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc43c5fa6a2487412fc0a0690fad1c8d SHA-1: a08691efa5d9494163c679135445042f660aeb03 SHA-256: cb85e6240625347e8f0dd48acf23498b80bd5273f1c98410cfc4d6254f35adc3
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to a URL related to 'credit score reporting agencies'. This URL is designed to redirect the user to further malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. No scripts were extracted, but the presence of the malicious redirector URL is sufficient to infer a phishing or social engineering attack.

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=credit+score+reporting+agencies
    • http://files.bluedotadventure.com/uploads/1/3/1/6/131607027/7186405.pdf
    • http://files.annettecargill.com/uploads/1/3/1/6/131607522/8294ec8a0dea8f.pdf
    • http://files.maryscheesecakes.com/uploads/1/3/1/6/131637043/bowotibimazebu.pdf
    • http://radajuwi.salinakennelclub.com/uploads/1/3/1/3/131398109/7356405.pdf
    • http://files.upotteryvillagehall.org.uk/uploads/1/3/0/7/130739212/dutafifaxawurin.pdf
    • https://cdn.shopify.com/s/files/1/0432/9209/8726/files/kavozufatatofomurokuxid.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3830/files/list_of_dog_breeds_a_z.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7330/files/9502004822.pdf
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/atrial_fibrillation_the_latest_management_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3073/files/61440788105.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/mapa_de_angola_actualizada.pdf
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/10284695227.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/excel_macros_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/60443231942.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_off00005eed.bin
657e38322677962ffd6df94065c0ebe1a6a20aa307ffa5d5301b08a998bb509d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EED 5020 bytes
font_01_sfnt_off00007004.bin
c52bd74b6297f3c5c78c9ea06b0951e836c2d25946568e5edf6f5461aed7e22b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7004 9952 bytes
font_02_sfnt_off00009225.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9225 4324 bytes