Malicious PDF — malware analysis report

Static analysis result for SHA-256 817e68ebf6c9f2f3…

MALICIOUS

PDF

57.9 KB Created: 2020-08-09 22:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cd33e29de747d8968627d05493ebf09 SHA-1: 11584b3a6f5398585bab9a43935d99900a872416 SHA-256: 817e68ebf6c9f2f35746817f064f7d92c86d45aa615e9f156a250e202897f0df
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a link farm infrastructure designed to redirect users to potentially malicious content. The primary redirector URL is identified as malicious. The document body, though obfuscated, contains keywords and URLs that align with a link-farming or redirection scheme.

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=6th+grade+math+vocabulary+words+pdf
    • http://files.djchemd.com/uploads/1/3/0/8/130874566/vefojudoliti-torawujub-moxogulojafi.pdf
    • http://files.oldfoxpenblanks.com/uploads/1/3/2/7/132740900/1533708.pdf
    • http://files.ovartisticdrive.com/uploads/1/3/1/3/131381706/lusaw.pdf
    • http://files.wowpartyrentals.org/uploads/1/3/1/3/131398428/8844315.pdf
    • http://files.davidkrasenyc.com/uploads/1/3/1/3/131381259/xagejabimofepen-supukox-fejapobapuzizex-domuzixerun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/guwinux.pdf
    • https://cdn.shopify.com/s/files/1/0429/3876/1379/files/nifurawedowutiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/babasetaxoguvivowe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/73828919809.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0665/files/6967868139.pdf
    • https://cdn.shopify.com/s/files/1/0430/5171/2666/files/58641772478.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5032/files/tidugudiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/74417710393.pdf
    • https://cdn.shopify.com/s/files/1/0437/8243/9063/files/8_team_bracket.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/desifowilujebuzef.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/siroxalogerobexa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9887/files/96493662316.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/bekizepijogivobumo.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_off000095c6.bin
71f660210fd01b5a8a8e03a8284cbb280eb2064037c8c0d3eaab51893d2de398		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95C6 5752 bytes
font_01_sfnt_off0000a971.bin
9a0ba9b6c65b052de4bc39f03864c0d8d6c9c5081388c4a044a203a214e02b4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA971 10196 bytes
font_02_sfnt_off0000cc21.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC21 4324 bytes

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