Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaff251d3c6c6416…

MALICIOUS

PDF

37.6 KB Created: 2020-08-16 20:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8d6c226992a73bcad0897daf068fb1f1 SHA-1: 2e7b02feeec58e103a2d1a7d965fb768c48cd9a1 SHA-256: eaff251d3c6c641647abb26cdb49d13c00ae571b28e3200b25dc04830518e009
162 Risk Score

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.cc/pify?keyword=chatrapathi+movie++hd In PDF document text
    • http://files.ryanogan.com/uploads/1/3/1/1/131163617/2992915.pdfIn PDF document text
    • http://vegij.druidforestschool.com/uploads/1/3/1/3/131379326/tuvema.pdfIn PDF document text
    • http://files.alarmsmeath.com/uploads/1/3/1/8/131857626/muwofewape-geporujunetut-nawabitil-gekikokavobo.pdfIn PDF document text
    • http://tubupe.hopkinselks.org/uploads/1/3/2/6/132682076/jaxikabetojaz_lobetepikuradi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3859/7539/files/lovavobatuxoziwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/zobim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/6981/files/guzedod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/leprosy_treatment_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/63875102737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/1683430903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7762/3201/files/lyman_shotshell_reloading_handbook.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B5F 4956 bytes
SHA-256: c190bd091e05c3e9b5fcf95577d6931e8cb7f4d4c30dd50ff77f64829d9c9599
font_01_sfnt_off00005c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C11 2860 bytes
SHA-256: 1908456bc6d99bf2e285dc18b339085b8e2e8aaf44c5500eb2a9c55715817742
font_02_sfnt_off000067d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D5 9856 bytes
SHA-256: 878c5a8537abe22a2ed4b5ba05f43f8c828e34a684bb5b5a1c3155293649104b

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