Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa30bda617f708e…

MALICIOUS

PDF

47.7 KB Created: 2020-08-06 14:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e6a4d5a0ef0fd793bbe213280b1e752 SHA-1: 471ec77d4ae9b2dcfbf4d39715e38a15610ff648 SHA-256: 1aa30bda617f708ed191ca0a5efca4e3f00e926a90e6d58eecaa04addaa1fd5e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to financial statements and the malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=profit%20and%20loss%20account%20and%20balance%20sheet%20examples%20pdf
    • http://files.wilmingtonprintandmail.com/uploads/1/3/1/6/131637057/cd8bc305482.pdf
    • http://files.paeoniapines.com/uploads/1/3/1/4/131406841/gumezekibox_resuri_didodizo.pdf
    • http://files.mommabearessentials.com/uploads/1/3/1/3/131398278/fepefuz_pewobeziri_kimovi.pdf
    • http://files.mutianyugreatwalltours.com/uploads/1/3/1/4/131407194/1041215.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/89969271212.pdf
    • https://cdn.shopify.com/s/files/1/0427/9857/9879/files/88577250367.pdf
    • https://cdn.shopify.com/s/files/1/0436/6280/3097/files/ssh_folder_permissions.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/16789877193.pdf
    • https://cdn.shopify.com/s/files/1/0436/5742/9145/files/data_analysis_with_r_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4567/files/wonizuze.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0858/files/microelectronics_circuit_analysis_and_design.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/tupegesuzepanaxojabiforax.pdf
    • https://cdn.shopify.com/s/files/1/0434/9627/6128/files/after_the_fall_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/kolutux.pdf
    • https://cdn.shopify.com/s/files/1/0435/2511/1967/files/97990486578.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/past_tense_worksheets_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/vibefidevomotezogu.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_off00007286.bin
7a28c73eca8a0fb6bf03e1056543ba2fd92f25d41dff34f5e61e9c819a1a987a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7286 5604 bytes
font_01_sfnt_off0000856c.bin
d85f2519d49bf651f59fa65ca02a356f92084a8a86f5b586a09e543d56e39445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x856C 13668 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.