Malicious PDF — malware analysis report

Static analysis result for SHA-256 758c13ea5ab6c6e2…

MALICIOUS

PDF

41.7 KB Created: 2020-08-24 00:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e145397410b3d36d76f7a09162a49e5 SHA-1: 3c6a2711c0c7264098eacee83966a725cd41bc0c SHA-256: 758c13ea5ab6c6e2e98d8f4ea7d52d4670f11b29c4080772a1e671728630d318
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One prominent URL, https://ttraff.com/pify?keyword=coastal+processes+and+landforms+worksheets, is identified as a malicious redirector. This indicates the document's primary purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing.

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/pify?keyword=coastal+processes+and+landforms+worksheets
    • http://files.chicagoquantum.com/uploads/1/3/0/9/130969470/jareberomufuvux-loderegolebura.pdf
    • http://files.autogadgetsonline.com/uploads/1/3/2/6/132695805/6537025.pdf
    • http://files.mechanicalstorms.com/uploads/1/3/1/6/131607075/2a2129.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/0665/5642/files/62302603461.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/safebotepazo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6912/8354/files/8289758682.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6018/files/julojev.pdf
    • https://cdn.shopify.com/s/files/1/0430/1520/9123/files/global_business_today_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/4246/4166/files/probability_sampling_dan_non_probability_sampling.pdf
    • https://cdn.shopify.com/s/files/1/0434/2163/0631/files/pavugufoxoreda.pdf
    • https://cdn.shopify.com/s/files/1/0433/4891/8440/files/adobe_acrobat_reader_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0428/4222/6854/files/roluradojedojolebusuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5123/8047/files/pibebamimotusofiwudapovej.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/diwobu.pdf
    • https://cdn.shopify.com/s/files/1/0445/4455/7220/files/ccr5_blocker_full_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005791.bin
cf27cf4b1eb3d0a760ded52c6b7c4c40a8688f6517d98c442c12b98216b56352		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5791 5312 bytes
font_01_sfnt_off00006983.bin
f2f37c3a0074394b4feabcf9627ec5b8f751fe007a3045b1e2c8d95242ef9df8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6983 9996 bytes
font_02_sfnt_off00008bb0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB0 4324 bytes

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