Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d0c3c0a5ad3d85…

MALICIOUS

PDF

39.2 KB Created: 2020-07-24 18:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a689e8256d09171cad0625c6b4503e8 SHA-1: 9c311e27cd431b41bee87fdd53822520a248477a SHA-256: 07d0c3c0a5ad3d85f82f337c770d29a9ab1513fb95f783baf7fd73fb5dda1a0a
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a known malicious redirector, disguised as a dishwasher manual. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the primary URL. The document body, though heavily obfuscated, appears to contain keywords related to the lure. The presence of numerous other PDF links suggests a link farm or SEO manipulation tactic.

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.com/wb?keyword=frigidaire%20dishwasher%20model%20fghd2465nf1a%20manual
    • http://files.somax-consulting.com/uploads/1/3/1/4/131438442/b55e6ecd98.pdf
    • http://files.bealrightchicago.com/uploads/1/3/2/8/132814473/3706698.pdf
    • http://files.ilovemytemple.com/uploads/1/3/0/8/130874231/tokaxusifukasix_xusifefojuf.pdf
    • http://files.kyleedavid.com/uploads/1/3/1/4/131453733/nuwizukibor-banaloxur-wufanojoxe-fazelox.pdf
    • http://files.thaivision.com/uploads/1/3/0/9/130969847/wutata-riguru-lewamomizasus-susobazoji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3188/8021/files/17857095529.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/majarawuderunewegemudi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3663/1452/files/12321363315.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/48397608031.pdf
    • https://cdn.shopify.com/s/files/1/0439/0692/4712/files/dotako.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/80365879521.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/54873859854.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vinufew.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0496/files/39444825019.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/mirediwalipuzexetimoxipog.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1381/files/30045388812.pdf
    • https://cdn.shopify.com/s/files/1/0435/2435/8308/files/nugoxikidewekug.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b08.bin
3a5f00f7620fd1d6948717a5fd268a230fc71ad7eec5affaf4ddc95c388b9441		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B08 5720 bytes
font_01_sfnt_off00006e73.bin
d03e4ee17e6495ced3700978abeed7bbb680007dfbc5d03c734311308e58796e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E73 9608 bytes

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