Malicious PDF — malware analysis report

Static analysis result for SHA-256 23662db7e8c3e92a…

MALICIOUS

PDF

50.9 KB Created: 2020-08-20 02:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c9bd694fbc7ef087246da508da88bf4 SHA-1: 6620ac2f4bd5e5b70999e7af3a1e1a4b12fe87a9 SHA-256: 23662db7e8c3e92a48dc05c0c23ab781f56a84d2ca881f8fb8f668bd361488a5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. The primary heuristic firing indicates that the document links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body contains garbled text but also includes the target URL, suggesting a lure to download or visit 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.cc/pify?keyword=video+editor+android+gratis+tanpa+watermark
    • http://firepiku.irishracehorseowners.com/uploads/1/3/1/4/131407705/sesetanopomi.pdf
    • http://files.utreepsu.com/uploads/1/3/2/6/132696145/a562493b.pdf
    • http://files.smallboatexchange.com/uploads/1/3/2/6/132681660/6638751.pdf
    • http://jupogefet.womeninstemuwo.com/uploads/1/3/0/7/130775735/redobexot.pdf
    • http://files.jamfinearts.com/uploads/1/3/2/6/132682790/16654b8.pdf
    • https://cdn.shopify.com/s/files/1/0438/2742/9533/files/bethena_a_concert_waltz.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2785/files/pegilokujabonivupuwefevil.pdf
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/lbdfx_fund_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/2830/6330/files/certificate_of_appreciation_template_blank.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/lotatakesusuvuda.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/49786675864.pdf
    • https://cdn.shopify.com/s/files/1/0428/5415/4406/files/27700488871.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/zasadubedupebika.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5197/files/faliximugepisif.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1959/files/sudilarexurifanenatimeba.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/87376384109.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4933/files/48264253831.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_off00007bc9.bin
880a54671d141253d2cb882349d17077499404bfe357920f230b7af0e8d5b394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC9 5156 bytes
font_01_sfnt_off00008d4d.bin
d00aa7d7678e1dff2bae092a8d1d9755892e948f899c80f45beec1a3d5c1fbe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4D 10092 bytes
font_02_sfnt_off0000afdc.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDC 4324 bytes

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