Malicious PDF — malware analysis report

Static analysis result for SHA-256 896648107039b167…

MALICIOUS

PDF

60.3 KB Created: 2020-08-08 04:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eed4846e126b38f856d23b8a8befabea SHA-1: ca1a02857008c88b387e6ed8b3850d0ddda2273e SHA-256: 896648107039b16706d4c99b2a7a99463ac5fd2e1f794f929a450982113cfba9
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The embedded URL `https://ttraff.cc/pify?keyword=angular+2+tutorial+pdf+ebook` is a clear indicator of a phishing or malicious redirection attempt. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to download or view content from potentially compromised or malicious sites.

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.cc/pify?keyword=angular+2+tutorial+pdf+ebook
    • http://files.heqiart.com/uploads/1/3/1/3/131378791/7412870.pdf
    • http://fuzip.thelocalsignman.com/uploads/1/3/1/6/131606027/newopakevotifok.pdf
    • http://rokuviwu.deeplydepressedtraveler.com/uploads/1/3/0/7/130740490/18501.pdf
    • http://files.leadtcml.com/uploads/1/3/2/7/132712034/c4f7d492f1.pdf
    • http://zufapate.expo4seniors.com/uploads/1/3/2/6/132695306/3902881.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/kapobusumijasibikujafino.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wizivudid.pdf
    • https://cdn.shopify.com/s/files/1/0428/3888/4519/files/upkar_reasoning_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7702/6463/files/jejivisafuseronupadif.pdf
    • https://cdn.shopify.com/s/files/1/0440/9432/4888/files/sodasosus.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1783/files/scaling_networks_companion_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/2629/8533/files/1763921810.pdf
    • https://cdn.shopify.com/s/files/1/0434/9086/9410/files/56804940168.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/13860030939.pdf
    • https://cdn.shopify.com/s/files/1/0440/5365/9798/files/46233779714.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3320/files/ragagurujoze.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2048/files/99958944532.pdf
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/malwarebytes_activation_code.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_off000096b0.bin
767ba7a9a1913e7765465caf121da38ad2f7e6fe5aa39ba22cfe7f131ec1c204		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96B0 5356 bytes
font_01_sfnt_off0000a8fb.bin
12c34cc8463a68451ee081ddf6889425ad3cde6c8290f3a69eb39c4162d35502		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8FB 10620 bytes
font_02_sfnt_off0000cd97.bin
cfb81015ccc48e34430eefe4798d2ceb6eb399c3071117bcf8196ad78feeec32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD97 16480 bytes

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