Malicious PDF — malware analysis report

Static analysis result for SHA-256 1737c92c8829dab2…

MALICIOUS

PDF

45.5 KB Created: 2020-08-18 15:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9614f93df237f2ad9899c124e4952dff SHA-1: 358b9f0d7caa10b2f73c2f52cff4e99ae6812689 SHA-256: 1737c92c8829dab278dc2197e357a761080224f89405f49e0c5ccb4d741796dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a deceptive document body and numerous embedded links, including a primary link to a known malicious redirector. The heuristic firings indicate this PDF is designed as a link farm, likely to distribute further malicious content or engage in SEO poisoning. While no scripts were extracted, the presence of embedded links and the malicious redirector strongly suggests an intent to redirect users to harmful 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.ru/pify?keyword=reportage+sept+a+huit+catherine+laborde
    • http://files.fairyringschool.org/uploads/1/3/1/6/131637307/352159.pdf
    • http://files.rfp.ie/uploads/1/3/0/7/130739742/fea6ccb.pdf
    • http://files.heart-2-heart-angels.com/uploads/1/3/1/4/131438019/3371569.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1212/0998/files/37254051006.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/ubuntu_installing_nvidia_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0438/6340/8795/files/bemexorirugaxanixavuvav.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/ge_documentation_library.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/capital_structure_ratios.pdf
    • https://cdn.shopify.com/s/files/1/0439/4283/8427/files/begubomodopu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/wuxurepelomadabovoted.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxumadebamapetutorobegew.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/loboravafobipamo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0581/9555/files/xigifogiwawovadizutivegif.pdf
    • https://cdn.shopify.com/s/files/1/0430/7828/7513/files/wisulobapodefolidobifize.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d1b.bin
25d4365587743843e8af829debc0ad139fba37e30663791b9d70885ef43a611a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1B 5484 bytes
font_01_sfnt_off00006fb3.bin
a27a0fea08f87b164ec474720549c93f9c26a1269a11f0f1bf3e3c04752a1856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB3 10024 bytes
font_02_sfnt_off00009239.bin
6f1ff871cf6f8a11a72652b45576c366cdb39a1ef29e9eb747fa7a572d777da9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9239 16132 bytes

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