Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba580a0648172b5…

MALICIOUS

PDF

67.8 KB Created: 2020-08-11 16:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06c28c68cab57736b1ad195d065dc98b SHA-1: 16b43c8aa6f6cdeb521254e81e541805d80161c9 SHA-256: 2ba580a0648172b5f2455c8b077298ed7cf449e16776cee09b9939a8ed02a936
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=bacaan+surat+ar+rahman+lengkap+pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to obscure the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=bacaan+surat+ar+rahman+lengkap+pdf
    • http://files.thedeclutterbugco.com/uploads/1/3/1/6/131606260/dagubutowepude.pdf
    • http://jikow.virginiaboyleart.com/uploads/1/3/1/3/131378814/gumisiganolote-kumugusifino-josom-zofoboxili.pdf
    • http://files.northweststeamart-uk.com/uploads/1/3/1/4/131438111/lalogitememilazeke.pdf
    • http://files.e3embedded.com/uploads/1/3/0/7/130738806/4751f.pdf
    • http://files.ornimetal.com/uploads/1/3/1/8/131871605/9dca17cac1f8.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/36155401216.pdf
    • https://cdn.shopify.com/s/files/1/0430/4912/3993/files/tovonijanagineb.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5099/files/nikow.pdf
    • https://cdn.shopify.com/s/files/1/0438/3129/6160/files/body_language_book_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/3709/0211/files/87173336423.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/lazevalanekun.pdf
    • https://cdn.shopify.com/s/files/1/0432/8099/0366/files/pizexinudirojufijenif.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/dilatomebexejijomutexalul.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/75049318948.pdf
    • https://cdn.shopify.com/s/files/1/0446/4807/1331/files/75901429839.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/acuerdos_de_paz_de_la_habana.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/52307809092.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
stream_006_off0000c7d9.bin
9099e232a5e0583da62d25117a66b75bf60b9ed8fe2eff3c1cbfb1c69817a7a2
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC7D9 31352 bytes
font_00_sfnt_off0000911e.bin
2bfd4d38cea52fd5c86f1c63b1698888f20831faab8ad71e19d49866d9bc8ab3
pdf-font-stream PDF embedded font (sfnt) at offset 0x911E 5684 bytes
font_01_sfnt_off0000a443.bin
c97e113b054ab04b1c6ef28757ba0458ce9d7ad4cb123f28a993e9d632f5cc8a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA443 11164 bytes