Malicious PDF — malware analysis report

Static analysis result for SHA-256 9577552195c5e596…

MALICIOUS

PDF

53.3 KB Created: 2020-08-31 08:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c0dd85288a42a805993afe8c40422e2 SHA-1: 5dced510dd07af7fa54274262ed3593fe74d3ced SHA-256: 9577552195c5e596a276d2ceb9fe3ac3ae08f294883b37148a890c0b397da232
154 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. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to shopify.com domains, suggesting an attempt to obscure the true malicious destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient to indicate a likely phishing or scam attempt.

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=calcul+des+co%25C3%25BBts+complets
    • https://cdn.shopify.com/s/files/1/0431/7511/6959/files/18680200758.pdf
    • https://cdn.shopify.com/s/files/1/0462/6710/5429/files/machu_picchu_map.pdf
    • https://cdn.shopify.com/s/files/1/0437/1575/6181/files/45_country_code.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/othello_book_online_with_line_number.pdf
    • https://cdn.shopify.com/s/files/1/0432/3426/3199/files/17544885860.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/59869137138.pdf
    • https://cdn.shopify.com/s/files/1/0429/3358/4028/files/82037587464.pdf
    • https://cdn.shopify.com/s/files/1/0437/6608/7832/files/90026926067.pdf
    • https://cdn.shopify.com/s/files/1/0448/2210/2173/files/ielts_reading_test_with_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1569/files/63922947299.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/51564922667.pdf
    • https://cdn.shopify.com/s/files/1/0434/7068/4317/files/19721677023.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/btec_level_2_award_performing_arts.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/the_complete_guide_to_asperger_s_syndrome_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/taxilon.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/9014645382.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_off00007819.bin
8f4f126909d8c3ca8e0fee364521303d82e31463be382346a274ec6d1e71c0e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7819 5152 bytes
font_01_sfnt_off00008955.bin
c1930500ce521bdc16154b48723d7067080378f7cfc720762ccbe7fc038ab354		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8955 11952 bytes
font_02_sfnt_off0000aecc.bin
05071ee97622cb3e3e80056de86320fd9e8bf2115f0b935ed52c2912531d0270		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAECC 16792 bytes

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