Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f97b99bbb6a430…

MALICIOUS

PDF

41.4 KB Created: 2020-08-09 07:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20d10ce8c5362ab4d99a51dee4c0b872 SHA-1: caea85bc38e97b4a5fdcfb35402594d883488685 SHA-256: c2f97b99bbb6a430db992493e0a62952af770887607be6ea0270f41315d0d9be
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body text, though partially corrupted, includes phrases related to 'Adobe acrobat reader pdf viewer editor creator download', suggesting a lure to trick users into clicking the malicious link. The primary malicious URL identified is https://ttraff.cc/pify?keyword=adobe+acrobat+reader+pdf+viewer+editor+creator+download, which is likely used to redirect users to a harmful destination.

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=adobe+acrobat+reader+pdf+viewer+editor+creator+download
    • http://files.michaelfoyle.org/uploads/1/3/2/6/132695620/wuwuretorataz-penati-japibe.pdf
    • http://files.gifts-from-the-sun.com/uploads/1/3/1/0/131070501/61d96b37a775.pdf
    • http://files.brisbanefreshflowers.com/uploads/1/3/0/7/130775646/42b0d.pdf
    • http://files.theathinai.com/uploads/1/3/0/8/130874324/fitebefidasuraja.pdf
    • https://cdn.shopify.com/s/files/1/0433/3230/5054/files/zoranosebowus.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/cantos_nuevos_lldm.pdf
    • https://cdn.shopify.com/s/files/1/0448/1790/7874/files/african_continental_free_trade_area_afcfta.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/66236967792.pdf
    • https://cdn.shopify.com/s/files/1/0450/6674/8056/files/steam_api._dll_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1957/files/factors_influencing_academic_performance_of_students.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/27618769802.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/pilivekavosevi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/29028482209.pdf
    • https://cdn.shopify.com/s/files/1/0449/7162/2559/files/adjetivos_calificativos_en_ingles_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/2083/7279/files/kipatefiga.pdf
    • https://cdn.shopify.com/s/files/1/0438/8939/3816/files/master_test_plan_template.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_off00006326.bin
77b8bac26f8103185151c5efe1fcc2f4b9d5334072ed947bebe90bea6ac0698c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6326 5252 bytes
font_01_sfnt_off00007526.bin
57f27b573a21116a01dc04c517d48630f4f2242d520267f98c29214d1aa6fa3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7526 10320 bytes

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