Malicious PDF — malware analysis report

Static analysis result for SHA-256 74921929eac50bd8…

MALICIOUS

PDF

39.5 KB Created: 2020-09-01 07:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecd858ea7ea9c2d35a1f8f1f6a512286 SHA-1: bce45e00f53389c9f70aaf25e51540d686ff628f SHA-256: 74921929eac50bd86dc917a7e448d7808db5a62cf343b1fae2e054de2152d3ff
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. The primary link, 'https://ttraff.com/wix?keyword=twitter+app+for+windows+phone', is designed to lure users to potentially harmful content. The presence of a large number of external PDF links further suggests a link farm or SEO manipulation tactic, aiming to drive traffic through deceptive means.

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/wix?keyword=twitter+app+for+windows+phone
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_cd080db55ec54f028f44cb67d5a5092d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7df854140934420bb0c28d4c1a31ffc7.pdf
    • https://static.usrfiles.com/ugd/76156b_dd8e7f6a6100487fbf309cb446e78627.pdf
    • https://static.usrfiles.com/ugd/362633_874d1e880446470f8ce1005799bc23d7.pdf
    • https://cdn.shopify.com/s/files/1/0435/7321/5387/files/47819323446.pdf
    • https://cdn.shopify.com/s/files/1/0438/0885/0081/files/ter_ou_ser_erich_fromm_livro_complet.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf551a7e46aa44c3a958e961fa977820.pdf
    • https://static.usrfiles.com/ugd/cc03df_16b3b12fd5584de090e583a9cbcf7557.pdf
    • https://static.usrfiles.com/ugd/b8c837_849a8febcf734a0292e4c09faf8f00b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbb0d3a6468c4f348c6ca5ee6f45e002.pdf
    • https://cdn.shopify.com/s/files/1/0429/8879/8111/files/18368204098.pdf
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/nuforuposavorusitugukato.pdf
    • https://cdn.shopify.com/s/files/1/0454/5000/2590/files/gopoger.pdf
    • https://cdn.shopify.com/s/files/1/0436/7345/2697/files/42253492571.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_off00005d71.bin
4c74aa4429dbd7223de7135bee19eadd1a139457e0f57181605ed622f493852b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D71 5140 bytes
font_01_sfnt_off00006efb.bin
1b3f1c75c0bf2415bb68fba0329e6c69610ac3440c833b4992dc2085427c88ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFB 10096 bytes