Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2c4b33496abfa3…

MALICIOUS

PDF

36.2 KB Created: 2020-08-29 15:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27644bc09f253f7bd6bce7fd380c4f66 SHA-1: b2bc67932cd63e316d1e8be6affa4395ef22a22f SHA-256: 5d2c4b33496abfa3c53c93f252db588340f25dab331e4f7b1f97f35d536fceb1
194 Risk Score

Malware Insights

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

The PDF document contains a lure related to a "Nys notary exam study guide free" and embeds a large number of links, including one to a known malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme designed to drive traffic to malicious sites. The presence of embedded links and the ML classifier's high confidence indicate malicious intent.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wix?keyword=nys+notary+exam+study+guide+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7366/7225/files/r_words_that_are_positive.pdf
    • https://cdn.shopify.com/s/files/1/0435/2209/7304/files/15231133856.pdf
    • https://cdn.shopify.com/s/files/1/0450/0835/5486/files/wiwawodixinuleli.pdf
    • https://cdn.shopify.com/s/files/1/0440/2036/7510/files/damegekovexe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/63772289739.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5104/files/equilibrio_de_mercado.pdf
    • https://static.usrfiles.com/ugd/b8c837_e31b0f6e683e4d1d84451930a1387feb.pdf
    • https://static.usrfiles.com/ugd/b8c837_95eeb68320074b9591d5225da0a34793.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb29977c52a348d393c4cc9969d8b762.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/fatepuxutezijaxasudemij.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/free_guided_progressive_muscle_relaxation.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/62715954626.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8118/files/theological_dictionary_of_the_new_testament_volume_vi.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_off00004f93.bin
cc06ea0b240eed05feefaea4d1bc41fad1eb27c5595d76cd8bcf704ebb28c38c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F93 5332 bytes
font_01_sfnt_off000061b1.bin
51e36b7f051312358e6e522bb2db0ae2b80ccaf12f47159b867fcac466680069		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B1 10008 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.