Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fed651f6b963df8…

MALICIOUS

PDF

47.2 KB Created: 2020-09-01 07:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1094552e5f4304459e7063e556676b19 SHA-1: dae1f35fd50c5bbcdba918644516448e1ea8ff65 SHA-256: 0fed651f6b963df8f30d693a7dcb1e67f82afde862367fdb07e25c81d7a0f325
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'printable christmas dinner menu template' and the malicious URL. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector URL supports a phishing or social engineering attack pattern.

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/wix?keyword=printable+christmas+dinner+menu+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_f6fa9a903a1f4da1a6b4070563175ce3.pdf
    • https://static.usrfiles.com/ugd/4f270c_18d9d650aa44466d814cb5f5fe6fa342.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9dd6113809a4788a1558277233cf625.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cbcdd66fa46440fabbe87efdfb1d3b1.pdf
    • https://static.usrfiles.com/ugd/d5d855_1c4cbd575fa0466fb2cb3f023da0ec27.pdf
    • https://cdn.shopify.com/s/files/1/0437/0523/7657/files/zudobi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7469/files/3507877987.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/mogozadoni.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/rationale_zahlen_regeln.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/43650165575.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4387/files/seranarosepaboganager.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/amoeba_sisters_video_recap_of_mitosis_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0439/6112/2974/files/technical_support_interview_questions_and_answers_free_download.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_off00007a20.bin
0d87c30685c6a8802cecb507f3fda07b989dfba420264d53fea034d0abc4f467
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A20 5456 bytes
font_01_sfnt_off00008c76.bin
23a20407715035b3e8af20bbe048e628bedabe4eef46ea3b5f2fd1c186305988
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C76 10312 bytes