Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ceda5ec5cb2403…

MALICIOUS

PDF

46.1 KB Created: 2020-09-09 21:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e043fc2b13ad98d92225514418770c5 SHA-1: 2b0a6004bd546ce182e48aa007a9d277b1801e80 SHA-256: 88ceda5ec5cb24031e459e8021ddd5afb55ef84e8f3088b25c970387551ed6cf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDFs. One critical heuristic firing indicates that a link points to known malicious redirector infrastructure. The document body, though partially garbled, contains text related to 'Anabole diet plan pdf' and includes a URL that matches the malicious redirector. This suggests the document is designed to drive traffic to malicious sites, likely for phishing or malware distribution.

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.me/wix?keyword=anabole+di%25C3%25A4t+plan+pdf
    • http://files.hihco.org/uploads/1/3/0/8/130873804/e485f6ac.pdf
    • http://files.rebeccagraceandrews.com/uploads/1/3/1/8/131871535/tezogi.pdf
    • http://files.seaglassbysharon.com/uploads/1/3/0/8/130814076/filotazebopenijesuka.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7894/files/tesano.pdf
    • https://cdn.shopify.com/s/files/1/0436/8121/8710/files/livro_alonso_e_finn.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3529/files/butterfly_bts_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0440/4979/3174/files/5738403339.pdf
    • https://static.usrfiles.com/ugd/a2de88_6b9f6d0f8b6a43e0a1e8f5eb8c977821.pdf
    • https://static.usrfiles.com/ugd/d1c05f_b56553da77764ce4988c080d117ec8de.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c7359982ed24ee2baf6faef56330ab3.pdf
    • https://static.usrfiles.com/ugd/b91566_d39f0040b7764233898e156dcad120d3.pdf
    • https://static.usrfiles.com/ugd/162fe6_0b7692b2b90341cda03e4e980b0d0536.pdf
    • https://static.usrfiles.com/ugd/85c99c_064c9e480e024a4fa2f01804ed777bcc.pdf
    • https://static.usrfiles.com/ugd/957c7b_9a8a8e68347c4614aca395c95fb62c1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_baf03b0f78af4595a2ef86900b87d4ac.pdf
    • https://static.usrfiles.com/ugd/1e4819_a071b14d615a42439759263b5226f0c9.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007457.bin
32cbcfa2237953afe111c40424c9ec5a62c070601e2f803961cd1c68218c013c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7457 5124 bytes
font_01_sfnt_off00008548.bin
ea46d5c3299b36a56af66c417d49ce86cee1417595f0503ba40a559e7f0898f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8548 11236 bytes