Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3227c5af022184…

MALICIOUS

PDF

48.4 KB Created: 2020-10-23 15:39:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: d063f2c0fa7fcc54196bbeb31a3650ea SHA-1: 1f85d4fb1a2224a1899f6618a7d7c702e097ea61 SHA-256: ba3227c5af022184a027813f3c3fcdc635c8bf557449e1fcfa64ad935e4ad627
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.me/aws?keyword=astaghfar+ki+fazilat+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f875bd694ac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f8ba055573f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370764/normal_5f89a5d43c3b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f8781f36c426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f885490cce80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f88afdf0db17.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000576d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000576d.bin)
    • https://cdn.shopify.com/s/files/1/0468/0312/4375/files/obamacare_california_income_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7426/4981/files/50040409724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1411/3445/files/square_root_curve_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/44679082368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6123/1262/files/ipad_2_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4490/4855/files/unidades_de_aire_acondicionado.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/gefoxojax.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/personal_pronouns_exercises_intermediate.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/angiosperm_families.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/pupopenosife.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/57392243187.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://dejavu.sourceforge.netIn extracted file (stream_006_off00009767.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_006_off00009767.bin)
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off0000576d.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009767.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9767 17720 bytes
SHA-256: 6e55d45878b46fac68fd0d9e56264ad2e64e9f699911f8bad6312b317b7468ab
font_00_sfnt_off0000576d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x576D 5404 bytes
SHA-256: 111832a7676ada8763f61fe5332d6fca93929efcb035aa4924d664379ba2aca1
font_01_sfnt_off000069cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CF 1748 bytes
SHA-256: a3fc0613295f94d0d193571187cb8228c806f0176742e1a4b04f3d3dd8990fd8
font_02_sfnt_off00007246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7246 11384 bytes
SHA-256: 13782f58c58f2e021c4d86d683c9a37885f2b3f69176052d1af965f650f46eb2