Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a991aa62d6cc87…

MALICIOUS

PDF

55.3 KB Created: 2020-09-05 22:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d940ce84e129d42a6dc8b13f861350fc SHA-1: 27a17834ea673248953adc231cff0a29644391ae SHA-256: f3a991aa62d6cc87d037038d3b07e326ad6790367c51547996ddf8752d73c364
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=arri+alexa+mini+user+guide' which is flagged as a malicious redirector. The presence of numerous other PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

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.club/wix?keyword=arri+alexa+mini+user+guide
    • https://cdn.shopify.com/s/files/1/0431/9700/5981/files/pakaduwozirobosaxegakino.pdf
    • https://cdn.shopify.com/s/files/1/0438/7579/5099/files/dagadadali.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/repesani.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_342844d4cb3c47bd8d09dd0dfa7fbb6f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8db61c4f5e14e4f851e78469309912c.pdf
    • https://static.usrfiles.com/ugd/18122d_2f7efa523b3b493c9eaa6674dec85a73.pdf
    • https://static.usrfiles.com/ugd/d43733_647947239a694f1b901a8c88ffb85f39.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/zozugive.pdf
    • https://cdn.shopify.com/s/files/1/0459/9844/0605/files/ragnarok_castle_location.pdf
    • https://cdn.shopify.com/s/files/1/0432/0237/9939/files/41643923673.pdf
    • https://cdn.shopify.com/s/files/1/0434/2310/5175/files/nenaputerotanodemijopaxir.pdf
    • https://static.usrfiles.com/ugd/9421c8_55fcad0a4f394b2fa5a9e2e939167c38.pdf
    • https://static.usrfiles.com/ugd/ab5adf_55a267a5eff24672872814fbfae3b1f8.pdf
    • https://static.usrfiles.com/ugd/7dd30d_61b76d0459be483d8358b514e4f3943b.pdf
    • https://static.usrfiles.com/ugd/03ae60_2d9c2800089a4f309c42b84bd7551ae1.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_off000078fa.bin
602fba5798ae93d6dfacffcd080af7154f4686b4fa2673fcace36faeb89b9dca
pdf-font-stream PDF embedded font (sfnt) at offset 0x78FA 5204 bytes
font_01_sfnt_off00008a99.bin
bfb94dc121edbd14a56c1fb30ae9ef664cf85de7d3ca0fe870a8abce596ee247
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A99 15120 bytes
font_02_sfnt_off0000ba46.bin
897cf2b70f4cbdbeb6abf451c016d5957d1a1de4ec62ea4e6a9870464d1d95c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA46 16288 bytes