Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c2d4d6303b5247…

MALICIOUS

PDF

53.2 KB Created: 2020-08-27 22:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c898bf7e97d05c77aaa19a748de19249 SHA-1: abe10cf5ecc721c206e4fbe544493dbed708d141 SHA-256: f9c2d4d6303b5247e20281917e146f7aed21c84c5826740b718be778e4ed002d
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external resources, which is flagged as a link farm. One critical heuristic identifies a link to a known malicious redirector, 'ttraff.cc', which is designed to obscure the final destination. The document body, though partially corrupted, contains the same malicious URL, indicating a clear intent to redirect the user. The ML classifier also strongly flagged this PDF as malicious.

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=list+of+positive+affirmations+for+friends
    • http://velutex.lutheranchurch-redbluff.org/uploads/1/3/1/6/131606289/15131.pdf
    • http://movapola.touroftasmania.com/uploads/1/3/2/8/132814930/9504445.pdf
    • http://files.tncommunitycorrections.org/uploads/1/3/1/3/131398357/d74a48da2e.pdf
    • http://zulubej.schuletriemli.ch/uploads/1/3/0/8/130874388/gilakidexolo-waralusuzu-kiwilex-detireza.pdf
    • https://cdn.shopify.com/s/files/1/0435/5578/2819/files/visual_aids_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/problemas_movimiento_rectilineo_uniforme.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/pdf_split_free_software.pdf
    • https://cdn.shopify.com/s/files/1/0429/4977/1427/files/dark_souls_3_npc_questline_guide.pdf
    • https://cdn.shopify.com/s/files/1/0465/9062/3909/files/divinity_original_sin_enhanced_edition_crafting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/well_of_eternity.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0086/files/boy_sad_whatsapp_status.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6161/files/.pdf
    • https://cdn.shopify.com/s/files/1/0430/7995/8679/files/kekat.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/nolugilinonagij.pdf
    • https://cdn.shopify.com/s/files/1/0429/7962/3071/files/19437482050.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/jadorofirinibiza.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/31512597465.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_off0000698c.bin
bfac372111b508a1ffc737a5baf7b8a8a7894ba949d0da8790f8768a5b48d405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x698C 4944 bytes
font_01_sfnt_off00007a44.bin
18df448e09b2afb0b9328afba8904395a9358dcb5d56d93c3fbd3a7f01555fd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A44 10224 bytes
font_02_sfnt_off00009d42.bin
6b53f05aa64f9dbd438f856d0dc5c81fd4235f1148ad62c5742f69063f500527		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D42 18052 bytes
font_03_sfnt_off0000b915.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB915 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.