Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5cb475d6f9a4f65…

MALICIOUS

PDF

50.0 KB Created: 2020-07-28 20:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e45d61cc68449f1d51642d70e8ccaea1 SHA-1: 2c437524adf5e6d9af4bdc91732836bbe69e25fe SHA-256: e5cb475d6f9a4f65c7c9224555909009d2d19138c12e1ae9fcce7b926f7ef2ef
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector (ttraff.cc). The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a pattern of linking to external sites, likely to distribute further malicious content or conduct phishing. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious redirectors suggests the primary attack vector is luring users to compromised or malicious web pages.

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=fundamentals+of+electroanalytical+chemistry+pdf
    • http://files.bardwellfarms.com/uploads/1/3/0/7/130739727/4074563.pdf
    • http://files.jerrygarciafoundation.net/uploads/1/3/1/3/131398334/9322465.pdf
    • http://files.lachicalocajc.com/uploads/1/3/1/4/131438888/3004103.pdf
    • http://files.naturalbalancetherapies.org/uploads/1/3/1/4/131406449/mevokejedixixar-ligomagase.pdf
    • http://files.neyensequence.com/uploads/1/3/1/3/131398452/tetoderemaxed_liwewuwidul.pdf
    • http://files.bardwellfarms.com/uploads/1/
    • https://cdn.shopify.com/s/files/1/0440/1351/9006/files/woxijofipawawixokopuxoze.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/92651336950.pdf
    • https://cdn.shopify.com/s/files/1/0431/4896/8100/files/gumusejagalojome.pdf
    • https://cdn.shopify.com/s/files/1/0432/5559/5172/files/xoduwuvowuzisakudu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/37172300137.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4266/files/kukito.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8574/files/26140287406.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/duxozo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9888/0680/files/78504597527.pdf
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/kigoduzifogedowopegal.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_off00008635.bin
e7a99fe0c6e7e13be40d1ce87020f743723656223c7b35af2109ec87787e6ea7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8635 5336 bytes
font_01_sfnt_off00009833.bin
69ce3a74ca4890c050d4a93d66daa62fe835f5bbf13a97eb4e035974fc599ed1
pdf-font-stream PDF embedded font (sfnt) at offset 0x9833 10160 bytes