Malicious PDF — malware analysis report

Static analysis result for SHA-256 47cb0a25dddde603…

MALICIOUS

PDF

50.1 KB Created: 2020-08-05 09:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcb922e2024ecdcce14e86775a719fda SHA-1: 301d279b81f9fd3e9880e29def6840078d3e1849 SHA-256: 47cb0a25dddde603bc8cb04783d83a96cbcb4a34fad3546b4971b8f9797e02b9
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.com/pify?keyword=santali+bible+pdf+download`. This URL is presented within the document body, disguised as a download link for a 'Santali bible pdf'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=santali+bible+pdf+download
    • http://files.miniphysio.co/uploads/1/3/1/4/131407572/5941284.pdf
    • http://files.developingfemaleleaders.com/uploads/1/3/0/7/130776206/xitifi.pdf
    • http://files.gatherhomeky.com/uploads/1/3/0/8/130874134/waxurovogurode.pdf
    • http://files.phyllis-kirk.com/uploads/1/3/1/4/131407388/gupenaradesuz-pumow-wavep.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/molijetavoxemekox.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/10607772736.pdf
    • https://cdn.shopify.com/s/files/1/0431/0299/4586/files/23533952807.pdf
    • https://cdn.shopify.com/s/files/1/0431/9261/5073/files/21275957026.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2484/files/11591596796.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/systematic_theology_grudem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdf
    • https://cdn.shopify.com/s/files/1/0437/3273/0008/files/34389983002.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/92445147680.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/lakexow.pdf
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/clicker_heros_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/kitapugerogiribudamada.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005aa1.bin
7c30dbaae7e6025ec1d81e6234cb0222c9530421e4de343ec65c89b63dfbf0dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA1 4328 bytes
font_01_sfnt_off000069cb.bin
8e933aa51dbb15139426629215c9df0a849e85545b75a7386a342f589706def3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CB 5096 bytes
font_02_sfnt_off00007b3f.bin
8394d947a0b051d4ae3deea3e1c06dc6616883d4e2fc9b3027d82f26de2817bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3F 4796 bytes
font_03_sfnt_off00008abb.bin
93605356a64ab17d700d7996783d20a07e66cddbff9b24ff312c5a5eb66fafed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABB 9932 bytes
font_04_sfnt_off0000acef.bin
58e91d5e891a904c3ddcc3eddc2b81f715299ef31402fbab59743e5653a57d1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACEF 3556 bytes

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