Malicious PDF — malware analysis report

Static analysis result for SHA-256 742a1675075baa70…

MALICIOUS

PDF

38.1 KB Created: 2020-08-31 09:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3208847e9f92e8ff45cc3f314de75ad SHA-1: a142a98929677bece467d59d6667c2d00a841b82 SHA-256: 742a1675075baa700969e15906ad78597971dc038ff81d9a779d3a62ac0324b3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and lures consistent with an advance-fee scam, aiming to trick users into paying fees for a non-existent prize or parcel. The embedded URL https://ttraff.ru/wix?keyword=list+of+dummies+books is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to lead users to malicious infrastructure.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.ru/wix?keyword=list+of+dummies+books
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_11d6c5dc5fcd45b691e18ddb7d4e19c8.pdf
    • https://static.usrfiles.com/ugd/3b47cb_5f53bb2e4b6041eb8f5a093e90cb5ecc.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a246bcdc79f4f99b04197eceba0ca09.pdf
    • https://static.usrfiles.com/ugd/0adedf_a845f478213f48ad8824fa74a06d785a.pdf
    • https://static.usrfiles.com/ugd/87fdc7_f15cda6c137a43e3a8bac4460577c1c4.pdf
    • https://static.usrfiles.com/ugd/0df15e_6391d4e3be1e42a4a5032488b6943dc7.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/46814137943.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9642/files/hyperchem_lisans_kodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7780/files/poesias_fernando_pessoa.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_babdfcfb0aa54aeea36976454ea16cbf.pdf
    • https://static.usrfiles.com/ugd/ac72e0_07870d9f16aa43c68cc1efbb93ade004.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6ddb78312ce49768f5daf9ceeee655e.pdf
    • https://static.usrfiles.com/ugd/26938b_865c7f37eec74c6498958dc91d722d1e.pdf
    • https://static.usrfiles.com/ugd/a91264_d1ad15e248a54d738ef504460b64c235.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_off000057fa.bin
f8a27c6a775e8181a77e1147c00086d47490c2208107534cc3b2d994434603f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57FA 4860 bytes
font_01_sfnt_off00006876.bin
e1f74708959b2bb8771d3a0094465e7176d4b57c25b6bb02541c46f2ab19dfaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6876 10276 bytes

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