Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4777c6ad0b9683…

MALICIOUS

PDF

46.3 KB Created: 2020-10-29 07:25:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: cb8e6d3ffad880a755604862898b2e05 SHA-1: 012ff6ea20c933b59b0c4f6ec1e3c07e6d58d0aa SHA-256: 2a4777c6ad0b968344840699460ab0ffc2e5c0d622ed039dad512edf0abd53a2
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.cc/123?keyword=dota+2+dazzle+set In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381730/normal_5f909b090eec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f90f1344be9d.pdfIn PDF document text
    • https://pubetisor.weebly.com/uploads/1/3/4/3/134348812/moxutemapipira-seturajexer-kotamirogufuxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380068/normal_5f8d3554a7b59.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/9419473.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/zexido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389354/normal_5f95c0578d4f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_5f9026b74e97a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_5f93a85b5e0a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380209/normal_5f8ece47050fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383579/normal_5f97e09a600e9.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/2085477.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/9620/4442/files/boxijunusibufebulodizeram.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/kadawezixoputevupivikom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1934/3288/files/diagramme_accords_guitare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/suwif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/xopusix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1713/7051/files/88275724727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4417/4496/files/tuxedo_shirt_studs_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9086/0962/files/veridian_temple_thermometer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9622/3133/files/north_states_supergate_ergo.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/dazipeluzenumovinuzinup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6627/7534/files/94895637719.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7575 4904 bytes
SHA-256: e3c6b180b81a3f8434978bd4db6950b07e5383a371425de2ab9e6faf4fdba6c1
font_01_sfnt_off00008645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8645 11076 bytes
SHA-256: 956d492f0766173c3f19ce9d3969fb4db0514a7108b47bc26ee7c2c60b29da40

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