Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebb3282690dfdfb…

MALICIOUS

PDF

50.6 KB Created: 2020-08-23 18:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fbce74eb105f027c6d41cb3c51da4da SHA-1: a666f8fc971de289665551bb9e0e8b257722e053 SHA-256: aebb3282690dfdfb2adfd1558b6af535f5edb1896d0a7c452dbe544f2132aaa7
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'bodyweight training for mass pdf' and the malicious URL. This suggests the document is designed to trick users into clicking malicious links, likely leading to further malware downloads or phishing pages.

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=bodyweight+training+for+mass+pdf
    • http://lalujiw.hdblues.org/uploads/1/3/1/4/131437622/f74de03e1c17dc.pdf
    • http://kugavo.churchwellness.net/uploads/1/3/0/8/130874588/jijufipuko_pikora.pdf
    • http://files.jerseycarpets.com/uploads/1/3/1/3/131380875/gexakegopapox_perujopodi_rikuguzivus_vimaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/xazodapesekabeperij.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/sexanik.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/application_vnd_ms_word.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/68595477027.pdf
    • https://cdn.shopify.com/s/files/1/0436/4229/0336/files/tivafevi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1283/2931/files/annamaria_testa_farsi_capire.pdf
    • https://cdn.shopify.com/s/files/1/0462/9073/1169/files/up_deled_2nd_semester_date_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/wupitefanesesoretijebuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/kibifezofo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5123/8047/files/walujarilatulefota.pdf
    • https://cdn.shopify.com/s/files/1/0437/5127/6696/files/ap_revised_pension_rules_1980_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1126/files/nolijitajuxun.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/xagigijutebabipekipedu.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_off0000874a.bin
1fb87356ed347fc4a9072cfacc1a11ec8d70286a071c6abf25b6603a22035c7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x874A 5664 bytes
font_01_sfnt_off00009a80.bin
1eb88c6d79c6a5bc91c99ad604902fca100be446dc3f5beee758b687df1015b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A80 10192 bytes