Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e68a4a5ad4af12c…

MALICIOUS

PDF

46.7 KB Created: 2020-09-17 09:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15add6f91832a2aa520177156880c7d7 SHA-1: 21c73ec91868edf6f3823a57da42be5810813d93 SHA-256: 4e68a4a5ad4af12cc3daa4ca9845761730e05ece90245c2b5e3764126878bc56
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the heuristic rules indicate it functions as a link farm, likely to distribute further malware or phishing content. The document body itself is largely unreadable, but the presence of the URL within it reinforces the malicious intent.

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.link/wix?keyword=rottgen+pieta+meaning
    • https://2360824b-a26b-4dbf-a09a-f9c1b0087c67.filesusr.com/ugd/011e4b_0ee36013cb234fc4934ea1f2e1f3f26f.pdf?index=true
    • https://fc57e5dc-d70f-4aa8-8e9b-2c95d79d7366.filesusr.com/ugd/72ed28_2d9822f6add14b82becf37a0466e7837.pdf?index=true
    • https://799b7ae1-11dd-4592-bce7-78a7d17c2dd7.filesusr.com/ugd/55e2c6_188868c17b2c40248d7d76becbe6ad12.pdf?index=true
    • https://3b319aa7-5462-4eaa-ade2-80121b4a4c05.filesusr.com/ugd/dad7b5_c0bc42bb07b44f9c8f82c49e0f385942.pdf?index=true
    • https://1846367d-d723-4ec1-9efa-fe8616cee74e.filesusr.com/ugd/7e0eb0_fac5f2fe505a4e5f92785f12e07aea3d.pdf?index=true
    • https://48b9dc58-96a3-4682-a6fb-cd84c8a4d528.filesusr.com/ugd/a9e086_4386eca8bb7448b2986cd90d6afe5ea3.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/lujexikuteterepolunupet.pdf
    • https://cdn.shopify.com/s/files/1/0429/0831/9903/files/cantico_delle_creature_in_volgare_umbro.pdf
    • https://cdn.shopify.com/s/files/1/0463/1799/4149/files/Bluttest_fr_Zink.pdf
    • https://cdn.shopify.com/s/files/1/0428/2541/6860/files/97703508013.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/io2f2_lewis_structure.pdf
    • https://cdn.shopify.com/s/files/1/0428/7977/8979/files/aes_financial_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotalufakelani.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_off00007a8d.bin
27285cdeb95ff3ba78bf69c850b413b01bda023d826110ad4417614cdb63a4f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8D 4840 bytes
font_01_sfnt_off00008b04.bin
322d9bd51a93fa59e2750d2d34a1793bce5c31bae009ee9b5e51aca6f39ec198
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B04 10356 bytes