Malicious PDF — malware analysis report

Static analysis result for SHA-256 b037337289fb1052…

MALICIOUS

PDF

42.6 KB Created: 2020-08-10 06:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf78dfddaa32751cc20ea357925c712b SHA-1: ae29735e0007c14637f77f85a0d8c1842a2d254b SHA-256: b037337289fb1052ff00d189b54ab8f56c4bcc6a8de72cb40107c1d38032316c
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'buku paket agama islam kelas 11 kurikulum 2020 pdf' and the malicious URL, suggesting a lure for users to download malicious content. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=buku+paket+agama+islam+kelas+11+kurikulum+2020+pdf
    • http://files.jasmineleflore.com/uploads/1/3/1/3/131380308/pibos.pdf
    • http://files.georgiarowswell.com/uploads/1/3/1/1/131164052/1f818e.pdf
    • http://muladid.heriotwattcu.com/uploads/1/3/2/8/132814930/7e426ee.pdf
    • https://cdn.shopify.com/s/files/1/0435/1485/5583/files/periodic_table_with_charges.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/forenuwumuduwise.pdf
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/70733681799.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8913/files/wow_classic_star_ruby.pdf
    • https://cdn.shopify.com/s/files/1/0437/9197/4557/files/16700501076.pdf
    • https://cdn.shopify.com/s/files/1/0440/4104/4118/files/wixejivijobujelimonudimaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/gulapidu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/64573469577.pdf
    • https://cdn.shopify.com/s/files/1/0432/3934/2247/files/58943020962.pdf
    • https://cdn.shopify.com/s/files/1/0431/5942/1092/files/mufuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32686583269.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a1e.bin
8755199cd1722836e4cf162afcf9b2cf1dc8572d36ef2c393f58fbc3f8172d76
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1E 5468 bytes
font_01_sfnt_off00006ccc.bin
93e37ce6a52ec29efaf0c97af66675aeaa2bb9e9109e4ac234a18b7930c6ead4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCC 10188 bytes
font_02_sfnt_off00008f78.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F78 4324 bytes