Malicious PDF — malware analysis report

Static analysis result for SHA-256 894ddd6dbf9d194d…

MALICIOUS

PDF

34.3 KB Created: 2020-08-28 15:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89bf7b9d8a4d1913cf8b7cda8cc38577 SHA-1: b3a16bebe8926c2e20e11f815c6dcb9a94bceab9 SHA-256: 894ddd6dbf9d194dc1ce71d53e67fb4348506a6244900090c4f31558a1bd379f
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 external PDF files hosted on Shopify. One prominent link, 'https://ttraff.cc/pify?keyword=dimensional+analysis+for+meds+4th+ed', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest a link farm or SEO manipulation tactic, likely intended to drive traffic to malicious sites under the guise of academic resources. No scripts were extracted, but the embedded links are the primary vector for malicious activity.

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.cc/pify?keyword=dimensional+analysis+for+meds+4th+ed
    • http://files.countyparkfriends.org/uploads/1/3/0/8/130814279/zobisulit_selitiga_sojinotavom.pdf
    • http://menimevit.mvnatmed.com/uploads/1/3/1/6/131606289/romujosi-nisad-rizaxa-woporesi.pdf
    • http://files.alloutafrica.org/uploads/1/3/0/8/130815058/jotawotewilobon_gugin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/3717/7494/files/joint_probability_mass_function.pdf
    • https://cdn.shopify.com/s/files/1/0432/5559/5172/files/44710693311.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/libomulexavexigaxudetej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76410179135.pdf
    • https://cdn.shopify.com/s/files/1/0435/2484/9815/files/chatterbox_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/fesugedubamo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/default_android_sdk_location_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/majarawuderunewegemudi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wadilizesiwegokadokepub.pdf
    • https://cdn.shopify.com/s/files/1/0441/2178/4472/files/apa_publication_manual_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0459/9739/2031/files/rojotusaligo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4122/4861/files/47468347598.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000491e.bin
53883b9f7da9439cac4f2fb7217c30146bee4b6b62c5a8ea01101fcd2acbd469		 pdf-font-stream PDF embedded font (sfnt) at offset 0x491E 5336 bytes
font_01_sfnt_off00005b1b.bin
d5444599ced5bda60d29c2702b22237d613c20768d7d241c5438a198b2c44de2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1B 9748 bytes

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