Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d5333400b221ad…

MALICIOUS

PDF

36.2 KB Created: 2020-08-20 11:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0ffa5bbaced849a75b3806c9409c029 SHA-1: 62c94da8357348df6e58a0f715eaf8618c732ba8 SHA-256: d1d5333400b221ad0f45b09a52871a16c6421c078a7e1fc3722842d2b4d98249
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'new malayalam movies app 2019' and the malicious URL, suggesting a lure for users interested in such content. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many hosted on shopify.com, likely for SEO manipulation or to obscure the true malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=new+malayalam+movies++app+2019
    • http://files.grandsalinelibrary.com/uploads/1/3/1/3/131384101/476b34764b88534.pdf
    • http://files.westminsterinfrance.com/uploads/1/3/0/7/130738620/7998859.pdf
    • http://wuxoka.littleswitzerlandwater.org/uploads/1/3/0/7/130776647/2137309.pdf
    • http://kunuruku.breedengallery.com/uploads/1/3/2/7/132740829/7213947.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/pobapizuwuseximupudedosa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2905/9994/files/31152430084.pdf
    • https://cdn.shopify.com/s/files/1/0437/3744/8609/files/botuvebimipuradiwadixuxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/89592398369.pdf
    • https://cdn.shopify.com/s/files/1/0437/0386/1416/files/20579693981.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/zafulerumokirupugisigu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0756/6239/files/polyembryony_in_angiosperms.pdf
    • https://cdn.shopify.com/s/files/1/0434/0980/1365/files/printable_answer_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/2512/1959/files/windows_7_ultimate_product_key.pdf
    • https://cdn.shopify.com/s/files/1/0439/4713/1035/files/96854570160.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_off00004cb1.bin
ba56b01d1d7b7316953b3c3b8349e6d426b3be7d54a0d120ace0931b2417537b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB1 5576 bytes
font_01_sfnt_off00005fbd.bin
ab6584787051b40a9f55e7b03b10f4eeacbd5547fecea11bf077f132938e3d10
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBD 10640 bytes