Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9fb1df9dcbbacf4…

MALICIOUS

PDF

46.9 KB Created: 2020-09-02 15:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7fbbc29646f4b48c4c35cda8011ffcb SHA-1: 1d788455cea31617561d0e34608daabc0280a5fd SHA-256: a9fb1df9dcbbacf4e790273ac53b6475f597103f34107a38f7fd28413e290093
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 'https://ttraff.link/wix?keyword=formato+a4+grafica'. Additionally, it exhibits a PDF link farm heuristic, with numerous links to external PDFs hosted on platforms like Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL and several Shopify URLs, reinforcing the malicious intent. The primary attack pattern is redirection to a malicious site, likely for phishing or a scam.

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.link/wix?keyword=formato+a4+grafica
    • https://cdn.shopify.com/s/files/1/0435/1921/3727/files/fepaxojusarisame.pdf
    • https://cdn.shopify.com/s/files/1/0440/0657/2182/files/autocad_basic_commands_in.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/79174220744.pdf
    • https://cdn.shopify.com/s/files/1/0440/7053/5318/files/ellie_goulding_burn_lyrics.pdf
    • https://static.usrfiles.com/ugd/0d9a50_96ef1d05c9ee43bdbc42971643e53650.pdf
    • https://static.usrfiles.com/ugd/b16523_0807e38778a74468a54d81bd481ef110.pdf
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/linux_mint_microsoft_office.pdf
    • https://cdn.shopify.com/s/files/1/0464/0243/7275/files/character_animation_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/0396/0731/files/marathon_wr50m_watch_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4896/0151/files/wazadalidufot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29480145432.pdf
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/43908449843.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1630/files/49450548823.pdf
    • https://cdn.shopify.com/s/files/1/0428/6650/7942/files/tejexijadipogefaxila.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/gudirinajofoturu.pdf
    • https://cdn.shopify.com/s/files/1/0439/3802/1531/files/muwufe.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_off00006988.bin
c28ef29f2c072d5ac553b12d27e6398ac883a975d5564cc173b58c825657c81c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6988 4424 bytes
font_01_sfnt_off00007902.bin
52fab9a77bafbdd393812ecb0145d7114ea75b114fcdd79aa238dd17e9fc13bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7902 5032 bytes
font_02_sfnt_off00008a19.bin
7540ed0d05fb2e1c7c30aead1fc7a2a14f65fa050af62a440d07191c1300a133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A19 10776 bytes

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