Malicious PDF — malware analysis report

Static analysis result for SHA-256 647fba7e1d592eb2…

MALICIOUS

PDF

49.1 KB Created: 2020-07-09 03:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 742c8b24d790b07f82501b714bb8e31b SHA-1: 44adb7e31dcbd9ff0147971b6ded313fa181aca2 SHA-256: 647fba7e1d592eb2316328463018cb104c9480b7c0729d456c8c4501ef051e94
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary URL, https://ttraff.ru/wb?keyword=speech%20language%20pathologist%20resume%20pdf, is flagged as a malicious redirector. This suggests the document is designed to funnel users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the presence of numerous external links indicates a malicious intent to redirect users.

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.ru/wb?keyword=speech%20language%20pathologist%20resume%20pdf
    • http://files.eugenemontgomery.com/uploads/1/3/1/4/131438766/zesolabugilobe.pdf
    • http://files.biophysical-ecology.com/uploads/1/3/1/4/131406356/xivut_girusidusowele_finusagon.pdf
    • http://files.light-sup.com/uploads/1/3/2/6/132681002/lolonegesositub.pdf
    • http://files.pgrtoc.org/uploads/1/3/0/7/130775856/5787856.pdf
    • http://files.innerstateproductions.com/uploads/1/3/1/6/131607522/zasubeg-kawajusuzut-jileletel-zapavolokotexul.pdf
    • http://files.gardenavenuepress.com/uploads/1/3/0/7/130740232/7557f3.pdf
    • http://files.costigancustompainting.com/uploads/1/3/1/8/131872285/wizezizalo-dajobebew-kelos.pdf
    • http://files.just-verandas.com/uploads/1/3/1/3/131379045/xobuxisedujus_wekabod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://miwexelak.files.wordpress.com/2020/07/26751875724.pdf
    • https://kilabizusu.files.wordpress.com/2020/07/14672699756.pdf
    • https://nomezemo.files.wordpress.com/2020/07/3837008484.pdf
    • https://pulebikib.files.wordpress.com/2020/07/47865342824.pdf
    • https://duzixegave.files.wordpress.com/2020/07/kafen.pdf
    • https://kozaxijewob.files.wordpress.com/2020/06/wukamagejugol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gowavofopinesifaremoka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/10809735118.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/birizakidunupujudexi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.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_off00007fdb.bin
fd7b8521d70b4326c45a90c5613f94782ebfe918f8c84a3949fb0051eb493fa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDB 5556 bytes
font_01_sfnt_off00009288.bin
c3ed43b01a5475d7bff8937f035f45996dc1fe0e842bdc94196f3c47b2ac3d88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9288 10800 bytes

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