Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c181219bcc997c…

MALICIOUS

PDF

53.3 KB Created: 2020-09-08 02:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 65bf01091808e6477218c1c9d3157a29 SHA-1: 710fc878ac504f4146765f6ff8e9a9bd512f5729 SHA-256: e6c181219bcc997c33771c75f10369ebde68e9b299ca75b0180b77fb6a8fff91
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to ttraff.com, disguised as a download for Microsoft SQL Server 2008 R2 ISO. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a link farm or SEO poisoning tactic to drive traffic to malicious infrastructure.

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=microsoft+sql+server+2008+r2+iso In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3676/2272/files/kaxazajefepegetawuxejob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/yahoo_mail_app_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/tapefezawawadenowegexudiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jaled.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/kemakejokij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/fewotuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5934/5573/files/astm_a1061_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6237/8139/files/wadibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/6752/3491/files/spaghetti_dinner_flyers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1695/1704/files/56448540846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8660/9573/files/19218958992.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c722c2_4aab1416f324437d9b54fac3ca8f19b0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f09a9d_30bc54fecf484fba914ff81fcc8a1a42.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3d639c7a310d48d2853b321422d04f5f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8b97dd_e8dc2edbc97c4ad48de2e747b9dd2ac3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0adedf_4db7120ee2834688aa7f93630db56bde.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A51 6924 bytes
SHA-256: 6624579db7a809986210dac279d3d55ae5b6aa78b5974ee23e2a0e2e8b7b2cfe
font_01_sfnt_off000081fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81FE 5324 bytes
SHA-256: 2976edfd10dcb30e0324e9af0a17b8e50abe41c103dd139fb9e094674a012f78
font_02_sfnt_off0000944e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944E 16200 bytes
SHA-256: 7769ddf0633ad42d8070f3ab789c40f9d3dbe45d0e3985b4be4d803789f50578

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