Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace14112ddc14d62…

MALICIOUS

PDF

49.2 KB Created: 2020-08-12 13:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28a4980e9998e233e056de81e88d351a SHA-1: 09fd8f8c93251a2928ffdb87ed1d63bc2033267f SHA-256: ace14112ddc14d62a9c4ee0ef388d395270b9408275d13af0809272bd0090389
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link redirects to a known malicious infrastructure at `ttraff.cc`. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed to obscure the malicious redirector. The document body, though garbled, contains the text 'Crianza de bovinos pdf' and the malicious URL, indicating a lure to download a PDF related to cattle farming which ultimately leads to a malicious site.

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=crianza+de+bovinos+pdf
    • http://files.giorgosmantas.com/uploads/1/3/2/7/132740778/3274264.pdf
    • http://files.newtonblades.com/uploads/1/3/1/3/131384171/nisatori.pdf
    • http://files.boltontrailscommittee.org/uploads/1/3/2/8/132814343/97902a83881.pdf
    • http://files.sequoiakungfuandyoga.com/uploads/1/3/0/7/130775098/xisapinujunuv.pdf
    • http://files.lairginitiative.co.uk/uploads/1/3/0/9/130968950/wemupe.pdf
    • https://cdn.shopify.com/s/files/1/0455/4902/7493/files/tubarolujaganusin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5015/files/sazonomeluvofawavit.pdf
    • https://cdn.shopify.com/s/files/1/0439/1288/8488/files/perimeter_and_area_of_polygons.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/levemakuvibexaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/nukigo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1949/9682/files/vineme.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/9771058501.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/kobupazamu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/gewununevasad.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6119/files/mutorewoluxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7554/files/fijebaturijiwegutex.pdf
    • https://cdn.shopify.com/s/files/1/0437/6798/8376/files/54290814807.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/jijaropax.pdf
    • https://cdn.shopify.com/s/files/1/0435/8343/9011/files/pdf_advertising_management.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_off00007e3c.bin
9c7785a0736ab52742bc4480be162efebceb2fad1db9ef11a10b013506b013c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3C 5160 bytes
font_01_sfnt_off00008fd9.bin
31d1e084e38a8cda407cef6920ba05ebfae532d2cb52cc77ffc213ff84bd1fad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD9 11976 bytes

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