Malicious PDF — malware analysis report

Static analysis result for SHA-256 7668b21bd7e4ce93…

MALICIOUS

PDF

63.0 KB Created: 2020-08-08 05:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09c61b540699875935e1033787efe809 SHA-1: dd58a428e53712eb1e758b91b77c891c5b068887 SHA-256: 7668b21bd7e4ce932060ed8ce4db4d109515475794cd6345868c421bdf8c2850
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to direct users to malicious content. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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=organophosphate+and+carbamate+poisoning+pdf
    • http://files.lifeindustries.org/uploads/1/3/1/3/131380723/9b1de54153e2a9.pdf
    • http://files.katrinamoorebooks.com/uploads/1/3/0/7/130775347/1945682.pdf
    • http://files.missourimidwivesassociation.com/uploads/1/3/2/6/132695200/zumod_xatejepijokede.pdf
    • http://files.energygroupuniversity.com/uploads/1/3/1/6/131606670/4d31e1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2857/6416/files/8857324169.pdf
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/bitolixivufenazud.pdf
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/jezaxalorasipekaralak.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/59591424544.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/sojixo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1962/4870/files/mukijekunavi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/marilyn_manson_sweet_dreams_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/toefl_structure_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/5027/7783/files/duzosizezo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/12585224921.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_off0000b563.bin
326f9d44fba761dc382a0c8c049e4f2245383f5f7e571bf6643b1260f5d25029
pdf-font-stream PDF embedded font (sfnt) at offset 0xB563 5704 bytes
font_01_sfnt_off0000c89a.bin
828ad561b7a9d7f63d99f2ca8de3409760f13f37c5e390cf5966cab6e196e534
pdf-font-stream PDF embedded font (sfnt) at offset 0xC89A 12012 bytes