Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab858300710af827…

MALICIOUS

PDF

43.3 KB Created: 2020-08-12 13:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d4c0b0fe890c77550091d5a5dc20db5 SHA-1: c73af1d9f1924dac430f21c925ba9063ca9e7bf9 SHA-256: ab858300710af827ec3ca3ed54901e589a74a9654557a43098fe54e332adb7fd
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 identifying a malicious redirector at 'ttraff.ru'. The document body, though partially corrupted, suggests a lure related to 'botanical names of flowers with pictures pdf', likely intended to mask the malicious nature of the links. The ML classifier strongly supports the malicious verdict. The primary attack pattern involves directing users to malicious infrastructure via these links.

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=botanical+names+of+flowers+with+pictures+pdf
    • http://files.peghaust.com/uploads/1/3/0/9/130968921/zuselewubu_mujikebegatusas.pdf
    • http://files.compusoftcanada.com/uploads/1/3/1/4/131452806/tojulo-buzepon-xametiwamimaxe-wepalokomim.pdf
    • http://files.monfortestatesdacula.com/uploads/1/3/1/3/131381540/gemitojotamid.pdf
    • http://files.whatisfusion.org/uploads/1/3/1/4/131406369/banilan.pdf
    • http://gowiwuwu.kennetheugenepeters.com/uploads/1/3/1/3/131384240/guzevibujokaxun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zizamazigunonafimav.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/narunavefawapuralulimi.pdf
    • https://cdn.shopify.com/s/files/1/0449/7424/3999/files/amulet_book_4_read_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/47027013501.pdf
    • https://cdn.shopify.com/s/files/1/0445/9456/1188/files/cub_scouts_leader_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/9817/7693/files/c_tokenize_string.pdf
    • https://cdn.shopify.com/s/files/1/0438/5390/6080/files/58756535930.pdf
    • https://cdn.shopify.com/s/files/1/0431/4149/6986/files/gukozob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitadekekogog.pdf
    • https://cdn.shopify.com/s/files/1/0429/6808/8742/files/venare.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/nedasuzomezurilinipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5373/files/clicker_heroes_browser_cheat.pdf
    • https://cdn.shopify.com/s/files/1/0435/4772/1882/files/zulezenazofareniva.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_off000061c9.bin
b101631fa5671ff251c60739d4c1dce3c70cfdcae1e44af5d5086209b8495269		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C9 5536 bytes
font_01_sfnt_off00007475.bin
fd27d9f1d3cf82b4864dcb23e9c30511f54ad0b620b320e28e7c03e4c371e02e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7475 14068 bytes

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