Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be6101ea9155129…

MALICIOUS

PDF

123.6 KB Created: 2020-08-30 06:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eecfcc9a521f76dc4626402afaab68c3 SHA-1: 81e82832347fb8e68317029e02524c62ce44f226 SHA-256: 8be6101ea9155129da28bcbd224551dfa7b4271abf13da66fadc9fa50f429f6f
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 URL is presented within the document body, disguised as a free download for 'Adventures in Middle Earth PDF'. The presence of numerous external links, many pointing to Shopify, suggests a link farm designed for SEO manipulation to attract unsuspecting users. 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.com/wix?keyword=adventures+in+middle+earth+pdf+free+download
    • https://cdn.shopify.com/s/files/1/0429/3689/3599/files/craftsman_42_riding_mower_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/8237/4561/files/29653280068.pdf
    • https://cdn.shopify.com/s/files/1/0437/5724/0469/files/smg_tyler_tx_showtimes.pdf
    • https://cdn.shopify.com/s/files/1/0440/6158/9669/files/49111073476.pdf
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/45491426233.pdf
    • https://cdn.shopify.com/s/files/1/0433/5897/8207/files/basic_instinct_2_in_isaimini.pdf
    • https://cdn.shopify.com/s/files/1/0429/1674/1283/files/5097397824.pdf
    • https://cdn.shopify.com/s/files/1/0430/2707/1127/files/rusufiwanefuganileravixit.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bb73b75561047939d52aa76e6e8a4b1.pdf
    • https://static.usrfiles.com/ugd/4dd980_af93e532ea6046e8be261d94044798fa.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_9bf02edea47947eabd351bb499fcf6e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd1238f0b46d4037a71f11897567eaff.pdf
    • https://static.usrfiles.com/ugd/b8c837_166c583fa7264da5955d4ece513af4a4.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7174/files/18187595919.pdf
    • https://cdn.shopify.com/s/files/1/0449/5032/3368/files/juzexiva.pdf
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/synaptics_for_windows_10_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4741/files/57703635865.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.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_off0001a7cb.bin
9b0e745bec38a32b28beab7ab7b9767533e59b559b35d2a96b9d43c843bdf7ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7CB 5420 bytes
font_01_sfnt_off0001ba1e.bin
bd55f2495b2ef35c9b17ca36dfc103b2fa152bb76b0083fd8fb2541e45e779f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA1E 11456 bytes

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