Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c141a8b1ee38d8d…

MALICIOUS

PDF

41.5 KB Created: 2020-08-16 10:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eae9e1188ec96c3e293ae3c11839cb94 SHA-1: 0de0689972a9e479226031ed51f77baa1215b15b SHA-256: 0c141a8b1ee38d8dade58b13971e7e545c2c39638d37490c21f358753184ac1c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a specific URL pointing to a redirector, which is flagged as malicious. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into believing they will receive a prize or benefit, requiring them to take further action, such as clicking the malicious link. The presence of numerous PDF links, many hosted on Shopify, suggests a link farm used to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=88+ball+pool+apk
    • http://files.castironbrighton.com/uploads/1/3/0/7/130740524/9558521.pdf
    • http://files.whiskeybenttradingco.com/uploads/1/3/0/7/130775912/d33d1fc87e2c.pdf
    • http://files.renewca.us/uploads/1/3/1/8/131857494/sixajadisunipi_zubowugulufi_zafodijifu_jitor.pdf
    • http://files.reikiwomb.com/uploads/1/3/1/4/131453535/6fa7393adb90.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/4843/4840/files/lakexuxedisezov.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/diloguz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/1619043215.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/52162893764.pdf
    • https://cdn.shopify.com/s/files/1/0438/7966/1736/files/js_force_html_redraw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/63586533799.pdf
    • https://cdn.shopify.com/s/files/1/0430/7704/2337/files/89970432729.pdf
    • https://cdn.shopify.com/s/files/1/0434/2471/0807/files/1st_grade_math_worksheets_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/2212/1122/files/44618308861.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/definition_principles_and_scope_of_environmental_science.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/87069942777.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/nukexijonogatoretad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lipowu.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_off000059a3.bin
7950b17fdb4c25aeb1c0f4ea5ea145c69ea6cfba9f0c3b84228cf048be018fc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A3 4276 bytes
font_01_sfnt_off0000680c.bin
46e0b88761ad67c2196d85a164ff53a5fe13d6202a2a9808ace7453a4cd5b9ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x680C 10232 bytes
font_02_sfnt_off00008b06.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B06 4324 bytes

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