Malicious PDF — malware analysis report

Static analysis result for SHA-256 98cc6215e78ebe43…

MALICIOUS

PDF

61.3 KB Created: 2020-08-08 19:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 212542e1df3ee160169a8241949bdea2 SHA-1: 70b03b096a2ebee2caa4c7a65cd8712ddd39afdd SHA-256: 98cc6215e78ebe43a8cc8270dbc5779c6afee571c1a5269e94ccb10aae95f42f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=tratado+de+dermatologia+belda+3+edicao+pdf'. This URL is embedded within the document body, suggesting a lure to trick users into clicking it. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=tratado+de+dermatologia+belda+3+edicao+pdf
    • http://debas.greenpc.com/uploads/1/3/0/8/130873995/jotikewubemeji-lodirupamafubu.pdf
    • http://divuxiser.colangelocreative.studio/uploads/1/3/0/7/130740178/susupu-badewulamuguv-nimatikok.pdf
    • http://files.thestudioartofdance.com/uploads/1/3/1/8/131871690/2547260.pdf
    • http://zelofozi.nicolajanephotography.com/uploads/1/3/0/8/130873995/8446188.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufanagapaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0260/files/pekatinidu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/minutivuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/9845/4682/files/tupevojuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/agile_project_management_for_dummies_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8667/6117/files/the_rock_vs_brock_lesnar.pdf
    • https://cdn.shopify.com/s/files/1/0434/8159/6066/files/rizidonewu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0935/9520/files/44137613161.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6578/files/free_wonderlic_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/numuzerejoluzatunekor.pdf
    • https://cdn.shopify.com/s/files/1/0441/3492/4440/files/63420080867.pdf
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/fitonubenagudeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/4073549410.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/zujuvunexoge.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/36314293010.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_off00009abe.bin
b542a6c2f7b5b2bf0720b2dd7d2fafc571defd3535ad4e5bd4a2a0e9619599d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABE 5548 bytes
font_01_sfnt_off0000ad83.bin
a681a682426868575291855cda81aa49598b2b219dc2d78f7691a6784e6bab32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD83 10596 bytes
font_02_sfnt_off0000d1c5.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C5 16204 bytes

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