Malicious PDF — malware analysis report

Static analysis result for SHA-256 8179de96e48d2e0f…

MALICIOUS

PDF

46.4 KB Created: 2020-08-05 01:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2acd4d50246121c552a63fbcee1fb3be SHA-1: 6cf11696a8334e11a6d8eefd7d172a55dd64a9a3 SHA-256: 8179de96e48d2e0fc3ba6db1f4234b29a3412946ddc57165382b6c256dc28e94
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links redirects through a known malicious redirector, ttraff.ru, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ap+transco+ae+syllabus+pdf
    • http://files.lomimassagetraining.com.au/uploads/1/3/1/6/131606118/cc37f68dc37c46.pdf
    • http://files.cleansweepmusic.com/uploads/1/3/1/8/131871462/nibifisem_nagaxawepu.pdf
    • http://files.teramorock.com/uploads/1/3/1/8/131857626/f437063.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/sexujedoxoxaxaluvomep.pdf
    • https://cdn.shopify.com/s/files/1/0434/1671/5429/files/kirilidisekikolixebor.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/26245871.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2415/files/35529550473.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/carcinoma_basocelular_micronodular.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/pobineninolazifubu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7701/6483/files/malajasakafonez.pdf
    • https://cdn.shopify.com/s/files/1/0438/2123/6386/files/pandas_rename_column_name.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/24553287684.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/kakotola.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/lodafugexamuxanonut.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/katozorug.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000674a.bin
b425fbe9b4a9450f113b9d13097be5ea4d85e529552bdd1cb78027bd6aec4a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674A 5216 bytes
font_01_sfnt_off00007906.bin
e948d60a0f7a13fffd43f2f563c43b5a763ae18c93d08e9ed4714c0e7e68f73b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7906 11620 bytes
font_02_sfnt_off00009ef4.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF4 4324 bytes

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