Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae420065e6812467…

MALICIOUS

PDF

47.7 KB Created: 2020-08-30 04:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37b1c7044e407e3e9a40edd4a2a463c9 SHA-1: 53f41ea7a624d8cc139b1753457dc2980ee8d93c SHA-256: ae420065e6812467c0d014288890b09d95dd0899845d37c344130863465e3e84
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.com'. This indicates the document's primary purpose is to redirect users to a malicious site. The presence of numerous other links, many hosted on 'cdn.shopify.com', suggests a link farm or SEO poisoning tactic to obscure the malicious destination. No scripts were extracted, but the malicious link is sufficient evidence of a phishing or redirection attack.

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/wix?keyword=%2525C3%2525A9valuation+f%2525C3%2525A9minin+des+adjectifs+cm2
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/73852118230.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50833930904.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/jalowevibobigitofijikori.pdf
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/60013770427.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/cambridge_english_empower_for_spanish_speakers_b2.pdf
    • https://static.usrfiles.com/ugd/4bb894_1839801d9c1f4c98952dcbfafb660ff4.pdf
    • https://static.usrfiles.com/ugd/29c71c_29af8c3175fb478394bc32c07b48fc3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_59d43a8d6cb24b2589552ae7dbc850ae.pdf
    • https://static.usrfiles.com/ugd/3b0c81_cd462fa938574ecd9cdc1ffebaa13469.pdf
    • https://cdn.shopify.com/s/files/1/0430/9712/9109/files/40198078119.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4156/files/gojolewemepov.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7396/files/how_to_reduce_file_size_using_mac_preview.pdf
    • https://cdn.shopify.com/s/files/1/0450/4610/4222/files/dopeliv.pdf
    • https://cdn.shopify.com/s/files/1/0428/8774/1599/files/14111216667.pdf
    • https://static.usrfiles.com/ugd/d55797_7653b94e69c045f38adde5cf6eb1f6e2.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_1a821885175442249c0123c697865600.pdf
    • https://static.usrfiles.com/ugd/e3834b_75319809ec094ca5acdc71712b3f46c0.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_off00006304.bin
15be7ff4997767725161563274dbc92bf79aab0e3c31c809bdeb1aeb841918fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6304 5460 bytes
font_01_sfnt_off00007554.bin
25e9bee2012dcc927e7f3002e61b77d1fce27cb48462121717442133b3c97d19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7554 10536 bytes
font_02_sfnt_off00009956.bin
069f5cdcb972b33999f3dc18a3e5b847fc2aa024b7c5b45b4734cedf253a8e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9956 16376 bytes

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