Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd6dde9c459b7f2…

MALICIOUS

PDF

94.4 KB Created: 2020-08-02 01:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 087ebb40656f78fe65c15a136e3b6c76 SHA-1: 4cd9d7b9db85cf014f2b1e15f7a0c39f4ef9040c SHA-256: 2cd6dde9c459b7f2ff1386019bff8eba10f9f3459746e57b42fc3c6bd9300c70
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL `https://ttraff.com/pify?keyword=1960+chevy+bel+air` is a known malicious redirector. Additionally, the PDF exhibits characteristics of a link farm, with numerous links to external PDFs, suggesting a coordinated effort to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=1960+chevy+bel+air
    • http://files.abookstudio.com/uploads/1/3/1/4/131437379/145186.pdf
    • http://files.root2riseyoga.org/uploads/1/3/0/8/130873715/fufito.pdf
    • http://files.cabogoldens.com/uploads/1/3/0/8/130874612/bejazowupuwebu.pdf
    • http://files.montalvinmanor.org/uploads/1/3/1/4/131483281/4217728.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/nibazuruwolovatunojeripi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6073/9752/files/5828439519.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29480145432.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34680977850.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/sapijepupapowupekiza.pdf
    • https://cdn.shopify.com/s/files/1/0428/6935/8758/files/duplicate_a_google_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/nijekuwiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/0884/2152/files/mikajelarawivit.pdf
    • https://cdn.shopify.com/s/files/1/0436/6227/8809/files/vozukenuxasirek.pdf
    • https://cdn.shopify.com/s/files/1/0429/3971/1644/files/mozova.pdf
    • https://cdn.shopify.com/s/files/1/0431/2986/4343/files/vovazeditazirokesez.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/24930325705.pdf
    • https://cdn.shopify.com/s/files/1/0431/3559/8758/files/gatesitodegove.pdf
    • https://cdn.shopify.com/s/files/1/0436/0496/7581/files/55753739035.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012019.bin
db5c2aeae5acc008afe5e2e5b170e7893236a4edb99f5e35288086a1d93dbf23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12019 5420 bytes
font_01_sfnt_off00013288.bin
98e802889c3af0a91ae90b0b29c514b412a33a545667761dc4fad823c8b30bdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13288 10840 bytes
font_02_sfnt_off00015763.bin
c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15763 16060 bytes

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