Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2afeae06e41d3b1…

MALICIOUS

PDF

46.3 KB Created: 2020-07-17 19:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f212b21ecc47bf405b94196e21ff7206 SHA-1: 2c6eb35f6f7e84d39dc3344cb52f73737b876526 SHA-256: a2afeae06e41d3b1fb6494e34dfb64d5d2fb316ea27d8f05f28fd451c0b4d3ef
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 URLs, identified as a link farm. One of these URLs, https://ttraff.ru/wb?keyword=ciclo%20de%20vida%20malaria%20pdf, is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users into clicking these links, potentially leading to malicious sites or further compromise. No scripts were extracted from this sample.

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.ru/wb?keyword=ciclo%20de%20vida%20malaria%20pdf
    • http://files.colourpurpletherapies.com/uploads/1/3/1/6/131606465/3d46feea640992.pdf
    • http://files.nicholasadamswrites.com/uploads/1/3/2/6/132695399/197bf7d7.pdf
    • http://files.doublejoutfittersny.com/uploads/1/3/0/7/130775565/taxosijeza_bapavulebeza.pdf
    • http://files.batavia5band.com/uploads/1/3/1/8/131871488/7000340.pdf
    • http://files.gulfcoastaphc.org/uploads/1/3/0/8/130874148/9dadf05718.pdf
    • http://files.nic
    • https://pazizeloguk.files.wordpress.com/2020/06/78217386798.pdf
    • https://jededoxi.files.wordpress.com/2020/06/93688152225.pdf
    • https://duzuxeg899067892.files.wordpress.com/2020/06/18963123358.pdf
    • https://vaduzakisi.files.wordpress.com/2020/07/79339153547.pdf
    • https://rubifup775891552.files.wordpress.com/2020/06/143155570.pdf
    • https://xomakumugi.files.wordpress.com/2020/06/pibelenewavaw.pdf
    • https://porefozasep.files.wordpress.com/2020/07/dobapuminosejivusimuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6129/6790/files/75953934140.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/80308037936.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65621046881.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kiwovanigefuminif.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/82331379056.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/76569310967.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.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_off00007784.bin
1cf1c83eeedf69d813c1cbaf64f01dca1356064ec93083907192c16b0bbae082		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7784 4808 bytes
font_01_sfnt_off000087de.bin
0656cf34af5c2533000e4ee87121f56080c5b33d73cbd229d5dc96adf195cf5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87DE 11152 bytes

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