Malicious PDF — malware analysis report

Static analysis result for SHA-256 5deb461f4a5814e1…

MALICIOUS

PDF

39.0 KB Created: 2020-08-08 01:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9d16de161e440a760ef865178d66a35 SHA-1: b6d4d1177ba0b52cb8f6ddf5a0413602420d27f2 SHA-256: 5deb461f4a5814e12c5e9da3e7fa4dec4d6bfd2fa499bba19ef5b9e96192ee71
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to potentially malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains a URL that appears to be a lure for downloading a PDF, which is then redirected via ttraff.cc. This suggests a phishing or scam attempt to redirect users to 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=accidentally+in+love+book+pdf+download
    • http://files.525westvanburen.com/uploads/1/3/1/1/131164399/007c9.pdf
    • http://files.womentransformingtechnology.com/uploads/1/3/2/7/132741382/3698925.pdf
    • http://files.whalawoffice.com/uploads/1/3/0/8/130874432/nedubatija.pdf
    • http://files.14445alondra.com/uploads/1/3/1/0/131070859/4385aaed.pdf
    • http://lawezode.usccssapr.com/uploads/1/3/1/6/131606165/tofini_pugeworupivis_pojesorumutu_xizolukegij.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/happy_birthday_piano_sheet_easy.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/32554722203.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/15689507905.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/xonenasojofaxaberoxawi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3676/2527/files/jafomupo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/19611260352.pdf
    • https://cdn.shopify.com/s/files/1/0432/2577/6288/files/metformina_y_alcohol.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/lobixa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7500/9696/files/abn_registration_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/86257916975.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95909873105.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_off00004968.bin
ca117f44083fee0d02a24a8f3e3efa5959ec655127a500a5b5f2b66bf776b4cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4968 4196 bytes
font_01_sfnt_off0000585b.bin
50acda7bd13ff30df511f0ba554bbd74d4e35324879e82edbf5b6ea33ed2b913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x585B 5320 bytes
font_02_sfnt_off00006aaa.bin
46d7cc18e6a161687c3ed4746dfbbddb1b7a2997c7a179c619d45d192b71a252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAA 9980 bytes

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