Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaeb615601f9ed68…

MALICIOUS

PDF

41.4 KB Created: 2020-08-16 18:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d277ecd5da501bd72d116459f5a86a3f SHA-1: b4c203ae4b4441b9b0dee9241abbd1341c219ba8 SHA-256: aaeb615601f9ed68dec25bd94ce376528f1001141d14151dcdf51c33751e857f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one prominently pointing to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though partially corrupted, includes text related to Excel formatting and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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/pify?keyword=excel+bedingte+formatierung+komplette+zeile+einf%25C3%25A4rben
    • http://files.wickedsweetrentals.com/uploads/1/3/0/7/130775848/9af87e1237.pdf
    • http://legilubup.scatteredsacred.com/uploads/1/3/1/1/131164239/2367133.pdf
    • http://files.queencitydoulaco.com/uploads/1/3/1/8/131871907/risojitoli.pdf
    • http://files.crystiles.com/uploads/1/3/1/8/131871970/ca733dd0c01208.pdf
    • http://files.dearborn411.com/uploads/1/3/2/7/132740860/xokagilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4005/5208/files/pidefapewixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/88737778798.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/jexekizijaxofakagoliziv.pdf
    • https://cdn.shopify.com/s/files/1/0429/6799/0438/files/azitromicina_900mg_bula.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/harry_potter_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2137/files/xifuworebasu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5064/5157/files/potato_salt_water_osmosis_lab_report_conclusion.pdf
    • https://cdn.shopify.com/s/files/1/0431/0777/8717/files/public_speaking_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/lsit_sample_test.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_off00005dc2.bin
663f4d0af27c0aa73d4ad998208b5c9fb0d2409ebd91cd53bacf3c37da08338b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC2 5812 bytes
font_01_sfnt_off000070e7.bin
908266e5560efff4a510253ede90749cc8f6164dcd211c09341aecc4e080d960
pdf-font-stream PDF embedded font (sfnt) at offset 0x70E7 11256 bytes