Malicious PDF — malware analysis report

Static analysis result for SHA-256 804dbb4afe677ca4…

MALICIOUS

PDF

39.1 KB Created: 2020-08-23 00:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d5b69c0c85b1d8e2fe4e72267ad7e51 SHA-1: 6fdd4f4107219405e446674dcab6b3a09b16d33c SHA-256: 804dbb4afe677ca44bd6a438adb74d66f95daff139e3af29d897be014c382a29
152 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded links, identified as a PDF link farm. One critical link points to a known malicious redirector infrastructure at 'ttraff.cc'. The primary purpose appears to be SEO manipulation through a mass of external PDF links, with a malicious redirector indicating a potential for further malicious activity. No scripts were extracted, limiting the analysis of direct payload delivery.

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=sustainability+report+perusahaan+indonesia
    • http://pibamu.indowbb.com/uploads/1/3/0/7/130738914/a9a5a.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8137/files/16320920881.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lebalod.pdf
    • https://cdn.shopify.com/s/files/1/0435/2924/0727/files/58434650246.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/nikopevelonozidupot.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/88080162680.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8095/files/battle_bears_gold_multiplayer.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/minecraft_xbox_360_maps.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1942/files/93845373854.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/nda_maths_formula_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/ncert_class_9_maths_solutions.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_off00005994.bin
a8de3ca263c8812f91aff9582a6834b7b94ece8782b65709d7eea23a028e9764		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5994 5392 bytes
font_01_sfnt_off00006bd1.bin
58cb741d0b3762cb0acbf9b8e7d5cf678ebe033d2a3f9450c7799451c5a003a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD1 10512 bytes

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