Malicious PDF — malware analysis report

Static analysis result for SHA-256 c015ba3d9bdce14a…

MALICIOUS

PDF

55.1 KB Created: 2020-08-19 18:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22360c31f5e7f94c00d8f91a175e4eeb SHA-1: b46cbc767a14626f269a6ac67880ade8dedebadb SHA-256: c015ba3d9bdce14a0a1a29178de65394f479808edac98cebafd91705b4deeea3
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text referencing "Jupyter notebook cheat sheet ibm" and the malicious URL https://ttraff.cc/pify?keyword=jupyter+notebook+cheat+sheet+ibm. This suggests a social engineering lure to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=jupyter+notebook+cheat+sheet+ibm
    • http://files.chriswalasekaudio.com/uploads/1/3/1/4/131453867/sitatavipix.pdf
    • https://cdn.shopify.com/s/files/1/0432/0493/5835/files/25981619428.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/ds2_iron_keep.pdf
    • https://cdn.shopify.com/s/files/1/0435/4483/8303/files/dozegofuvunuxavu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9010/7815/files/de_finibus_bonorum_et_malorum_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/8099/8302/files/voziguwemogovujetigo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6209/files/rumufujejimometetugud.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3988/files/14392834996.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/89681586279.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d7a.bin
848a66544d53bcfceb416b269c5915d48857d4286d66f6e3a1fb6f9c5b73f73a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7A 8276 bytes
font_01_sfnt_off00007731.bin
85f79847d8c661d624aeead9b6d8e0f057f33ab30ff3599135d2c47da96bacd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7731 5436 bytes
font_02_sfnt_off0000898b.bin
0c246f2b563487b5ee210bac83b9e680ec466228cefe1f2bf249b3f5b2766326
pdf-font-stream PDF embedded font (sfnt) at offset 0x898B 13560 bytes
font_03_sfnt_off0000b538.bin
6b832f8426b75f525ee6a2ff239346656cf4dc60321099f394024254b1eec699
pdf-font-stream PDF embedded font (sfnt) at offset 0xB538 17092 bytes