Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4c6f5e757fea50…

MALICIOUS

PDF

42.6 KB Created: 2020-08-24 01:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e3b15a534150d19f63d6846359bd694 SHA-1: 9bb8c385605cd8a373438a4b1a8d07db462bde8f SHA-256: ec4c6f5e757fea500089aadea31a50bffbc2171331e4d304562ed0d683c92f7f
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'dream girl movie free tamilrockers' and the malicious URL, suggesting a lure to a pirated content site that likely hosts malware or phishing content. The ML classifier also strongly flagged this PDF as malicious.

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=dream+girl+movie+free++tamilrockers
    • http://rijoz.alisonmckenzieacupuncture.com/uploads/1/3/0/7/130775111/1281429.pdf
    • https://cdn.shopify.com/s/files/1/0434/6380/3046/files/96748341150.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/78338001258.pdf
    • https://cdn.shopify.com/s/files/1/0437/5478/2869/files/1-_300_classic_engineering_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/0410/6651/files/ripozasagakowalatutop.pdf
    • https://cdn.shopify.com/s/files/1/0431/0679/5686/files/71815303062.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/restaurant_inventory_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/63006958791.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/cisco_2960_xr_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/98187570171.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1786/files/15144916114.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/wonuxexukoveta.pdf
    • https://cdn.shopify.com/s/files/1/0450/5029/8520/files/3200264255.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1858/files/xhamster_video_downloader.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/xikawigafupo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74535711799.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/
    • https://cdn.shopify.com/s/files/1/0432/5366/1858/files/xhamst

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006709.bin
767ff939ea6ad1ff08110916c219c626537d0fe8aeed58d917d1b206403ca22d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6709 5324 bytes
font_01_sfnt_off00007921.bin
1ef338b3c1457167a505769f404c5b64fc2fa4bbe2fe24af5a08560c25e3cd03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7921 10556 bytes

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