Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc0c899366a7d6e…

MALICIOUS

PDF

44.5 KB Created: 2020-08-07 05:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e87837ec851e692322f9d7a52970e54 SHA-1: d0ca097f62433983ee01a6aba3897e02247ae56a SHA-256: 9fc0c899366a7d6e35cd5541d2ae3f5172ab834da671a2600358604b16e4a934
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to ttraff.com, indicating a phishing or malicious redirection attempt. The ML classifier also flagged this PDF with high confidence. The document body, though obfuscated, contains the target URL, suggesting the primary goal is to lure the user to click the malicious link.

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=attestation+sur+l+honneur+exemple+pdf
    • http://files.joolboxcreations.com/uploads/1/3/1/0/131070247/xabate-rovakuxub-wexoduvizuxi.pdf
    • http://files.lexroulor.com/uploads/1/3/2/7/132710776/97aaa103b225.pdf
    • http://bepomek.gracecatcollective.com/uploads/1/3/0/7/130740596/c99f7.pdf
    • http://files.invictafooddesign.com/uploads/1/3/1/6/131636712/58699eabc1cc113.pdf
    • https://cdn.shopify.com/s/files/1/0438/6720/9893/files/xisetowupomisisawasolab.pdf
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/validity_and_reliability_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/8602/8708/files/backstepping_controller.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/bisapexab.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/tunabi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2716/1507/files/gatisowaraxetiravapovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5006/files/33440703226.pdf
    • https://cdn.shopify.com/s/files/1/0436/4389/5958/files/12703685207.pdf
    • https://cdn.shopify.com/s/files/1/0433/0441/9478/files/les_journaux_algeriens_en_arabe_aujourd_hui.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9648/files/66454110581.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e96.bin
5057e3317781a09e6713444b2c4826b263f6ce1c617b411b92a7dcfa42f1d116
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E96 5220 bytes
font_01_sfnt_off00007023.bin
d82f8368d6f0dcf69de43196e6a2764ff21481ab6cbbe2c1a15f16e0c5586a29
pdf-font-stream PDF embedded font (sfnt) at offset 0x7023 11728 bytes
font_02_sfnt_off0000952a.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x952A 4324 bytes