Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6ad0e01c700cd4…

MALICIOUS

PDF

42.0 KB Created: 2020-07-31 03:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd43703715a5ee3d427c4fdadaf6c483 SHA-1: 11948f3baa9d60a7a5ffe61333928755239fcbce SHA-256: ab6ad0e01c700cd494c9a5e432b5b7a9b547b9e7c2e786939d8b9faf19eeb705
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector (ttraff.cc). The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, appears to be a lure related to 'Baleno accessories pdf'. The presence of numerous external PDF links suggests a link farm or redirection strategy to distribute further malicious content.

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=baleno+accessories+pdf
    • http://files.conniewesley.com/uploads/1/3/1/6/131637774/3f32a6e3d7.pdf
    • http://files.christalineadrianti.com/uploads/1/3/1/1/131164452/8581398.pdf
    • http://files.filmtest.net/uploads/1/3/0/8/130813961/kelotoloremubigu.pdf
    • http://files.cateringandcreations.net/uploads/1/3/0/8/130814513/9295549.pdf
    • http://files.christalineadrianti.com/uploads/1/3/1/1/131164452/858139
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/81935460195.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/jorapizodopiviba.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3464/files/74908857827.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/refavepifogexazoderadewe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6216/files/38435282056.pdf
    • https://cdn.shopify.com/s/files/1/0437/3010/8577/files/lolixupoxijutifulax.pdf
    • https://cdn.shopify.com/s/files/1/0432/0378/8960/files/disup.pdf
    • https://cdn.shopify.com/s/files/1/0436/0372/2398/files/turerimakarewoxuresetaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/lenonurixuga.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7748/files/8675664462.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/monumegasuwipijuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/23609072810.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_off000067e6.bin
dae1a391f6102d9ed2b9764ff8b198205ff9f88a98594526036ce3de3e899e54
pdf-font-stream PDF embedded font (sfnt) at offset 0x67E6 4904 bytes
font_01_sfnt_off00007891.bin
4f4e733a31180c18f8ecfd87e82e579c743578275e156aebab7af9d4eaab03d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7891 10100 bytes