Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b9d42f6132da61…

MALICIOUS

PDF

45.1 KB Created: 2020-08-31 05:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc17bfd719823a04ef61e768627dc1c0 SHA-1: 5bc91e6b2d0aaeea831edbe2e73cfbc04380d3b5 SHA-256: e1b9d42f6132da61d5d02f0fb20e39fe01358f95ad1bcc31d73bfe1fc3223bad
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it features a large number of embedded links, many hosted on cdn.shopify.com, suggesting a link farm or redirection strategy. The presence of the URL 'https://ttraff.com/wix?keyword=wix+strip+dimensions' is a high-priority indicator of malicious intent.

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=wix+strip+dimensions
    • https://cdn.shopify.com/s/files/1/0428/6650/7942/files/bupegakobilivexovexu.pdf
    • https://cdn.shopify.com/s/files/1/0463/2657/9362/files/aggiornamenti_bloccato_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/jimasakewa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/fefaziwezogirifuwisurew.pdf
    • https://cdn.shopify.com/s/files/1/0428/4638/8380/files/nuderepekuvegivo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/26972655960.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/rafigulatuxinipiso.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/belajar_membaca_alquran.pdf
    • https://static.usrfiles.com/ugd/3f4b99_766fc137f1404578835a8053ccc12c3b.pdf
    • https://static.usrfiles.com/ugd/df4650_678a9f65ca8d4ed4a0bdeb4f66826462.pdf
    • https://static.usrfiles.com/ugd/8acad3_52ed132d7615433f87a3796bff5a5c10.pdf
    • https://static.usrfiles.com/ugd/b8c837_47e4f217def14a49a6bad2a3b6129161.pdf
    • https://static.usrfiles.com/ugd/24853a_32f886d7efae493bb996d065ba584379.pdf
    • https://static.usrfiles.com/ugd/89c6ad_92a1a0e9dd444e3ea1a8aeea33b90453.pdf
    • https://static.usrfiles.com/ugd/e5412a_5d79b447a38943579c9583df06e579cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_a52dcec19ad449e08cce8e75e85e1561.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb9596d55daa406ca86ad6718f62e0b2.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_off000065f4.bin
2a4daed1ad250b71771f40756e54209bf50f165c3ace163e1f763f17a829159c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F4 4732 bytes
font_01_sfnt_off000075f4.bin
f010e62027e1a09dded01cd6cf8987381b0c0b06512a0c6b8afb3c828182532c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F4 10684 bytes
font_02_sfnt_off000099b7.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99B7 4324 bytes

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